I've been seeing escorts over the past few years and have found that with the proper research and attitude it can be a great experience. First off:
The Erotic Review : Escort Reviews in UNITED STATES - Phoenix
TER is your friend. You have to pay to get all the features but it's absolutely worth it. I punched in Phoenix b/c your profile lists you in AZ and has probably the greatest concentration of escorts in your area. Go through the reviews for each girl and check out the rankings. Make sure there are more than a few reviews and that they're recent. Get some info on what services she provides, how she performs, etc. Her page should link to her website where you can get her contact info, rates and pictures. Avoid any girls that seem really airbrushed or photoshopped. Rates may vary by location but an hour with your average escort will run you $300 - $600. Once you settle on the one you like give her a call.
She may not pick up right away (popular independent girls can be especially tricky to get a hold of) but just be patient and hopefully you'll get a hold of her. When you do, don't make any explicit references to sex or money. Tell her you'd like to make a one-hour appointment (either at her location, if she has one, or at a reputable hotel you've booked in advance). You will be expected to provide her with some personal information so she knows who you are. If the appointment is at her location you'll be operating on the two-call system. Some higher-end escorts require independent verification service, like Perferred 411 (Google it). It costs money but it's definitley worth it. Once you settle on a time and place it's just a matter of showing up well-dressed and well-groomed.
Be polite and respectful when you meet her and have the money in an unmarked and unsealed envelope. She may ask to see your ID and may make a call to confirm her safety. Once everything is settled you and her should politely discuss your expectations for the evening and begin the experience.
Other random bits of info: you may have paid for the full hour, but once your load is blown that's pretty much the end. Do yourself a favor and rub out that easy one beforehand. Also, bring an extra condom or two just in case. When it's all over do your peers a favor and review her on TER. If the experience went well you may even be able to list her as a reference for future adventures, which will serve you well.
If there's anything else PM me. Cheers.