First, I would encourage you to read my section on
Etiquette help you understand the basics.
Second, we need to discuss the kind of encounter you would like to have with me. What you would like to do is the foundation of this discussion, like a meal at the restaurant, a museum visit, movies, intimacy and so on. That will give me a good idea of what you're looking for, especially if you can give me details of what you like sexually. It can be specific, like: "I love cunnilingus", or more general like: "I prefer when it's soft and sensuous".
Third, we'll discuss the duration. I'll help you out with some advice if so necessary to be sure you get what you want. It's here that you'll have an idea of the required donation.
Fourth, we need to figure out where and when.
Lastly, when you're ready to confirm everything, then it's just a question of making a deposit.