Can people tell us what your first experience was like with an escort. Was there any terrible ones?

What is the protocol with escorts? I mean do you make a booking a day or two in advance or just before you go visit her? What happens when you get there - I take it she demands money immediately. Do you have to have a shower first? And then what, she messages you and tries to get you hard? And then its onto the main course? Does she put on the rubber just to make sure you're not trying to fuck her without one?
Do you only get the time up until you come even though you've booked for 30 mins.?
And can you pay by Visa...........only joking, now thats a stupid question.