through either P411 or Date-Check. Anyone of the ladies who does any kind of screening will ask you for this information without having to give up all of your personal information each and every time.
Third: The regional advertising boards here, or the gallery city search through Date-Check will provide lots of potential options. You can read the reviews, and get the feel for what others think about the lady.
Fourth: STAY AWAY FROM BACKPAGE P E R I O D.....Fake pictures, Law Enforcement, rip-offs abound there. Use Tineye to search images, Google the phone number, and ask questions before you leap.
Fifth: Plan for 90 minutes minimum with a new provider. Not only will you have a chance to get the adrenalin worked out and find your way off the ceiling, the the extra time will do wonders and gives you time to chat about all kinds of things. The majority of ladies here will want you to well.
I thought I was going to have a heart attack on my first adventure. Fortunately, she took pity on this poor boy and gave a lot of the same advise you are getting on the board here.
Don't stress it, don't discuss ANYTHING over the phone other than you name, where you found them, a date and time that works for you, and length of the session. Everything you want to ask will be found either on her website, or in the reviews. This can be some serious fun and RELAX.