I'm a complete noob with escorts, don't know jack squat about anything of this subject. Only experience  I've had is with AMPs.

Anyways, I'm a little confused about something here. I've seen listings for providers that charge $300+ an hr, and they refer to it as donation. Then I see other's that only charge $100-$200 an hr. How can there be such a difference in price?

Is there something I'm missing here, or is it just that, there are other providers that simply ask more $ per hour than others? I'm afraid if I go to a provider that states it's $150 for 1hr, I go there with just $150, and that she maybe expecting more than just the $150 for FS.

Thanks to anyone who can help out!

Just because a provider sets her rates at 300/hr does not mean every other provider is going to have the same rate.When looking at ads you will see rates that range anywhere from low rates to high rates.
In certain cites rates might be higher in a huge populated city such as vegas,nyc,la,etc versus some small town where the rates majority of the times will be alot lower.Yes there are some providers who will ask for a higher rate than other providers.
If you stick with a well-reviewed provider you should not have an issue with an upsell which means the rates on their website and/or ads is the rate you pay.I would suggest getting VIP here if you have not already.

You need to start reading reviews and that should answer a lot of your question, keep in mind that the rate is determined by the provider based on a lot of factors (location, services, volume, appearance, age, experience, reviews etc).
For your purposes, sticking to well reviewed providers here on TER is the key to your success. While the prices vary, I would say that anything below 300 may not be FS (I could be wrong) or perhaps the quality may not be what you expect ( don't think a 200 provider could afford a 4 stars hotel or a luxury condo if she is low volume, or that her incall is in a nice part of town, but then again you will need to do your due diligence and find out).
Find what lady appeals to you in your city, read her reviews entirely and start from there but keep in mind that some ladies may not be newbie friendly, I know it's pretty confusing but if you do your research proactively you will find someone willing to take a chance with you provided that you pass her screening. You can research more about it in previous threads.
Read the self help center found by the lifesaver, and my last word of advice, stay away from Backpage.. Maybe down the road you can experiment with it, but this is not the time.

This is a trick post, right? Oh and if you've never heard the phrase I included a link for you.

New gals prob charge less as they try to build up a list of regulars.  More popular ones will charge more because they have proven track records and deliver quality service.  Another factor is what the local market will bear.  If they charge to much, they may not attract the number of clients they are looking for.  Just because she charges under $300 does not mean there is no FS.  I have seen plenty of providers for less than $300 and gotten wonderful FS from them.

As mentioned above, you do need to get VIP membership to properly research providers you want to see.  You should also read the self help center.

Swim

Thank for your replies, guys. Okay, well I have VIP on this site, and I did take a look at her reviews (only 3 of them), and no one mentions if she's newbie friendly or not. Is this a question I should ask to her directly?

to pricing is location.  Incall / hotel costs are much higher in certain cities and sometimes in certain parts of the year (high season in tourist areas).

you should be looking at providers with more than three reviews by well established reviewers. You want someone who has been around a while and knows how to handle a newbie, to lead you through your first adventure here.

If you read the providers reviews you will get an idea if there is an interest.  If she is not reviewed....be careful...it really does not matter what her donation is....its up to your budget and what you are willing to give.....