I'm going to be the contrary voice here. Really consider if you want to do this. Once this door is open, it's very hard to close, and it will alter your perception on sex and intimacy. Maybe for the better, maybe for the worse. Giving this up is harder than you might think.
If you know you have an addictive personality, or know that you can be needy emotionally, I suggest you get that sorted out first. Therapy, meditation, whatever. Get that sorted out first.
Then consider if this a one time thing (a fantasy you need to fulfill), or potentially something you'll want to keep going for whatever reason. This is as much a financial and lifestyle decision as anything, and setting up rough parameters of what might be ahead of you.
Lastly, if this isn't a one time fantasy fulfillment, do NOT spend money on a $400+ provider or multiple hours. It doesn't matter if you can afford it easily or not. You won't really be able to enjoy the time the way it deserves to be spent. I highly suggest choosing to spend some time with Temporary Girlfriends Club or 1122 Agency first. Learn the patterns, expectations, manners, and just get comfortable enough with the entire "process" to start really enjoying time with an escort. Then start thinking about the specific things you want to experience.