Violet blake has some nice posts and seems very with it but that is all I know of her. I had a couple of sessions with Holly Taylor and definitely can strongly recommend her. There was a very recent review of Holly that is quite accurate. I would recommend starting your career with Holly then trying out the others to broaden your reference points.
If this is your first time then you might want to consider how many scores you will be able to make and if you want some pampering and relaxation afterwards. You may not know enough about sex and your own body to realize that you will likely see this happen quite quickly, and how you may feel physically, and that you may recover and want to do it again within a half hour. That would set the stage for your time interval. If this is kind of a coming out celebration and hearlding of your new life then take two hours and enjoy and definitely do employ Holly.
If you are somewhat concerned and uncertain and reserved then cut back to an hour but ask the SP before you start if an on the spot time extension might be available in case you really get into it.
I would also suggest you talk to these Service Providers (SP), each on the phone and just be honest with them as you have been here. See who you feel the most comfortable with. Some gals come across on the phone much better than they do in person though. You wil want to visit one though who is well reviewed, professional, and has a very clean boudoir. You might also contemplate what foreplay you expect. Like do you want some good lip french kissing, some. Breast work, etc. That fits Holly Taylor well. A lot of gals are not into kissing and that leaves a lot of guys cold. You may or may not want caressing before and after. I like the idea of pre and post event kissing and caressing...so my recommendation is still Holly.
These are just a few thoughts for your checklist.
Let us know what you decide and how the event goes.