I'm a newbie as well. I definitely get nervous. It hasn't prevented me from following through on my desire to hobby occasionally, but is a major factor in how much I enjoy it and how smoothly things that transpire in a provider's company. So far, things have been a bit turbulent, but I've had some understanding ladies to give a helping hand, literally and figuratively.
It is like other situations where you are in a high-stress new environment. It is really easy to hit a level of sensory overload. I am still smacked hard by that in the hobby. If you asked my a lot of details about my first encounter, I'd draw a blank on many of them. The experience was so new, so dramatically different from anything in my life that I could only process so much so fast. I know that will fade, but it will take time and repetition of the process.
Two similar situations for comparison:
The first time you drove a car, you weren't half at ease as you are now. You probably didn't carry on conversations as much, check out the scenery (female or otherwise) passing by, talk on the phone, etc. You were to focused on the core task of driving to add in the incidentals and successfully multitask.
The first time I jumped out of an airplane, it was amazing, but hellish overload. It was hard to get over the raw sensation of frefalling at 120 mph. I didn't get much beyond the "holy shit, I'm freefalling, must open parachute at 5500 feet" that whole jump. I couldn't have told you what color the sky was, which direction the plane was flying in relation to the landing strip, how many times I checked my altimeter, or anything.
Like most people, I'm lax and complacent with my driving. Not so much with skydiving, but I have no problem throwing my gear on and jumping with minimal prep and following a complex plan involving other people and planes. I have established a relative comfort with what the procedures are, what the sensations will be, etc. I still have a healthy respect for the danger and treat it accordingly, but the perceptual tunnel vision has broadened out to where I can savor a wider sense of the experience.
I expect that given time, I will lose some of the nervous jitters and performance doubt with respect to hobbying. That will make things go better, but I can't expect that all at once. It will be a gradual thing. There is a lot involved in hobbying to adjust to, such as LE risk, health risk, family risk, in addition to the thrill of rapidly getting intimate with a stranger. Some element of nervous energy is part of the experience. If I ever become totally complacent with this hobby, it will probably be time to quit.
So, if you are open to advice from a newbie only a few encounters past where you are yourself, I'd say:
Tell the lady! They have seen newbies before, and will adjust their actions accordingly, to be extra helpful and understanding.
If you have a mental script of what you want to do, ditch it. Once you are in the door and feel safe that nobody else will come knocking, let the provider take the lead. I started with a "must do this, then that, then that, followed by..." mental picture, which I got hung up on, instead of just relating to the lady whose time I was sharing. (Still working on this one myself).
Basically, just let things happen. Post and let us know how it goes!