Like Dick says. if you're expecting to see the girl in the pictures, you're likely to be seriously disappointed. I'd say the best you can do is cancel the meeting and spend the time reading through recent reviews to see if you can spot a girl that tickles your wotsit.
For your first punt, you'd be much better going to a well reviewed, genuine, girl who will accommodate any first-time nerves. There are plenty around if you do some research.
If you do go ahead with your booking, good luck (just don't though, really...)