It's nerve wracking, but what you have to remember is they don't give a crap what you look like, how big your penis is or how good looking you are (to an extent)
All they care about is you being clean, getting their money and making you enjoy it so you come back.
So, don't worry, just enjoy it! It's not like it's some random girl who might talk to people you know etc, or judge. An escort would be good practice, a way of learning to control yourself and feel self confident for wen you do find a woman to be with.