I haven't seen any of the other girls recommended in this thread myself yet, but there's another SP I had my first time with in a situation very very similiar to Twilight7's that hasn't been mentioned yet.
The SP I ended up seeing for the first time was Ashlee. I know she just started recently at Revive but I thought I saw a post somewhere recently saying she also does outcalls through them, unfortunately I cannot find that post again so I'm unable to confirm it, or maybe I made a mistake and it was relating to a different SP. I'm sure if you wanted to persue you could phone revive to find out.
My heart must have been pumping at 160+ BPM when she knocked on the door for our session, but from the moment she spoke I was calmed down and instantly relaxed, she made me feel fan-freaking-tastic.
As a beginner I thought looks/weight were a factor in how a SP would respond to me as well, but I quickly learned that the most important things are attitude and hygiene. Even if you are as ugly as Abraham Lincoln, if you are nice to her, respect her, have cleaned up well and are sobor, she will probably be comfortable with you, making it easier for you to relax and able to enjoy yourself.
Good luck!