I am strongly considering going down on a provider for the first time (first time I've ever done it, that is).  I really get off on giving the girl pleasure so this seems necessary.  I'm way more nervous than I should be, I think I'll have a few drinks first.  

Best position is her sitting on your face. Other positions I often get a crick in my neck, and the ladies seem to LOVE that position. One time I asked for it and she was overjoyed.

Girls know how to please girls better than guys do. So watch their technique. Also, know how to find her G Spot and use your fingers to stimulate it while you dine.

Who is better at teaching you how to please a woman than herself? lol.
A few things though:
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1) Dont over do it. If you sense the girl wants to move on to other activities, follow her lead. Of course many like to be pleased but some like to do the pleasing and dont want you all caught up in pleasing them. Its a fine line to be sure and only one learned by experience.
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2) Be careful with the drinks beforehand. Some girls wont mind, others might. Drinking with her is the better option, generally, but some women dont drink at all. In any case, try and keep it to a minimum especially if you have never met up before.

First off, I highly recommend you don’t drink first. You might feel it will calm your nerves, and maybe it will. But it will also make you less coordinated and more likely to be sloppy. Being a little nervous is a good thing. It’s a sign you care.

But seriously,  let her know you're new to it and she'll guide you.  

First off kudos to you for trying & caring.  

dot the "I", which is really peachy.  

Go to one of the big porn hub websites (hint, hint) and search mrpussylicking! This guy is king of that, g-spot stimulation and squirting! He even does “how to” videos! On the same porn tube, search Ultra flms lesbian. They have great close up videos. Finally try atk girlfrnds. Best technique is go mostly soft and slow, start by kissing her neck shoulders and boobs, then work down! Soft and slow licking clit up and down a few times then round and round! Ask for feedback, what does she like? Have fun and get her wet down there! Go for it! You lucky bastard you have a lifetime of pussy licking ahead!!

I can honestly say these tips are better than I could have hoped!  Super helpful!  Keep ‘em cumming (pun intended)!

Thanks!  I’ve always heard that before. This will be my plan.  Seems not too complicated but effective.  

If rimming, should he spell out the Greek alphabet?

Ideally, you have already seen the provider you want to do this with.  Talk to her beforehand.  Tell her you want to go down on her and you want her help.  99 out of 100 providers will be thrilled to help.  

Sometimes I want additional physical stimulation like this – and also also, sometimes I don’t. Sometimes my tissue is sensitive, sometimes I am trying not to get a UTI, sometimes I know that getting a bunch of oral before hand is going to make intercourse painful later.

Lots of good advice already.  But be patient and take your time.  Most ladies take longer to reach O than guys so don't just try for 5 mins and move on. And usually soft and gentle is better than hungry hippo.

. . . not only in trade negotiations

multi-cunnilingual, that is.  

Start with a flat relaxed tongue 👅. Kiss and lick her inner thighs, slowly getting closer to her lips. Once you're there give a long slow lapping from her taint, up one side and exhale over her clit as you go to the other but don't touch yet. Then do the same on the other side, even taking her entire left lip in your mouth with some suction. She'll begin to react and then slide a finger up and down he right lip to mimick your tongue.  She'll feel as if she has two tongues working on her and you haven't even touched her clit yet. Start with that and let her guide you, you'll do great!

I asked AI "What are the earliest uses of the "cunning linguist" jokes?" and it said:  
"The cunning linguist jokes have been around for thousands of years, going back to ancient Rome "callidus linguista" and ancient Greece "πονηρός γλωσσολόγος". Most contemporary attempts to use that old joke are pretty lame and fall short of the humorous part of our great Western Tradition. Those lame jokesters should take their standup schtick to the old forum at the Colosseum and let the Gladiators, Lions, and spectators decide their fate." 👎

one of mine was TheCunningLinguist, which I used along with ConanTheGrammarian to comment on grammatical issues.

Practice, Practice, Practice.  

Interesting suggestion. Most of the other linguistic references were to existing TER relevant activities:
(assumed) English alphabet = vanilla
Greek alphabet = Greek (no need to explain TER meaning)
Chinese characters = Chinese cowgirl or Reverse Chinese cowgirl
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We could add the known Cyrillic alphabet to be used when performing Russian (TER meaning).
We could add some special French additions (accent grave, aigu, circumflex, cedilla, etc.) when tracing out French entertainment (TER meaning) with your tongues.  
We could add the Hangul (Korean) alphabet when trying to spell things out with your tongue when visiting K-girls.
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So mrfisher's suggestion is an indirect question about any special meaning for "Arabic" with reference to our TER-related activities?  "I had a date with my ATF. We started with French, then progressed to some Russian, then cunnilingus and mish (vanilla = English alphabet) and then a trip to Greece. We wanted to try an Arabic, a Hebrew, a Spanish (tilde; virgulilla) and a Braille but we had no idea what those entailed. At least we Finnished with some oooos and aaaaas."
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If they do not already exist, what TER acts have characteristics that can be named:
an Arabic
a Hebrew  
a Spanish
a Braille  
a Japanese or Nihongo  
a Rune or Viking
... others?

being so curvy and intricate, would make for the most satisfying experience.

Oh. I think that (Greek) zeta and xi are curvy and challenging, even to a skilled tongue. And I was also focused on the trend of activity associated alphabets. I guess if you are planning to get your kling on that you are going to trace the curves using Klingon.

uttered by the ancient philosopher, Testiclees.

One lady told me afterward "Only visit me at night.  I am a professional, and that makes me very sleepy."

This reminds me of the "coconut challenge" meme from a few years ago where women had to spell COCONUT while riding their man on top and see if he does (or does not - can't remember) finish. lol

Seven of Nine is a Ten. Atmosphere: Out of this world. Piercings: Other

Not meaning to hi Jack your thread, but maybe add to your first time.  To receiver's and givers:  
Do you prefer face sitting, spread eagle or putting a pillow or 2 under ass?

I love DATY & will take it in any position!

A young man should find a young civvie gal their own age and learn these things. Yall didnt learn this in high school?  

That was some of the better advice given on this thread.  

a large percentage of P4P customers see providers because they have to, as they have absolutely no idea what it means to seduce a woman into their bed without plying her with money first.  I blame cell phones and texting for this utter lack of social skills with women.  Guys coming of age in the 90's were the most noticeable in their lack of game with civvie women compared to prior generations.  Those of us that grew up in the hippie "free love" generation or the era of "pick-up" bars where both men AND women went for immediate no-strings sex hookups have the skills necessary to easily seduce civvie women.  Now, go ahead, anybody, and ask why I ALSO see providers, if you don't know already. Lol

I really don’t have a favorite position, I’m happy as long as there’s a pussy in my mouth.  

As much as I do love DATY myself, I want to make it about her. The more she is pleased, the more excited I am. So, for me, I want her to be comfortable. Most ladies seem to prefer lying down spread eagle. I have been with a few who prefer me laying down with them on top. I had one who preferred me from behind with her on all fours, similar to doggy. But she really preferred this because after I started on her pussy, she would shift her ass so I was eating it out instead. She is one of the hottest escorts I have seen and has a near perfect ass, so I did not mind one bit. I saw her 3 times, and each time she did the same thing.