I think you need to think about a budget and stick to it. Don't book 2 hours as a first time like some sites tell you, an hour is plenty of time. Speak to her on the phone as mentioned, even if you are nervous. Make sure she is chatty and friendly, if she sounds disinterested or moody don't bother. I would also recommend meeting an established escort, i.e. one with good feedback and reputation, ignore the new escorts with 0 feedback.