Lots of providers won't respond if the initial contact doesn't include what they want for screening, particularly for someone new.  You should also decide how much information you are comfortable giving to a provider.  It's not uncommon for providers to ask for a lot of personal info.  

Here are some Tips for Newbies I've collected over the years; you might find them useful.

1.  Check out the newbie board; lots of good info there
2.  Get the VIP membership so you can see the review details and have access to the PM system
3.  Spend some time learning how to use the search functions for both reviews and the discussion board so you can identify ladies you would be interested in seeing based on the criteria that matter most to you (ex: looks, menu, rates, etc.)
4.  Figure out what kind of verification the ladies you would like to see require and how you can meet those requirements.  Some ladies are very particular.  Others are more flexible.  It's OK to contact them about it if you are not sure; just remember to be discreet.  Any  explicit questions will likely get you disconnect or otherwise ignored.
5.  Some ladies advertise here or on other sites that they are newbie friendly; keep an eye out for that.
6.  Consider joining a site such as P411 that pre-screens potential clients.  Some escorts will accept membership in such sites as satisfactory verification.
7.  If you are still puzzled by something after having done research, please feel free to ask questions.  I think for the most part we are willing to help out so long as we think you are not just freeloading on what others have learned.
8.  Develop a bit of a thick skin; some people are going to be jerks regardless.
9.  If an ad or offer looks TGTBT, it's probably TGTBT.
10. If you find yourself in any situation that doesn't feel quite right, trust your instincts and walk away.
11. As a newcomer, stick with well-reviewed ladies.  It's harder when you are inexperienced to figure out who the legit providers are from the fakes and scammers when they don't have reviews.
12.  Google is very useful.  Searching on a phone number or other info from an ad in Google can sometimes save you a lot of grief. Google Image Search is another very useful tool to search for other places where pictures in an ad are being used.
13. To help uncover ads that are using someone else pics Google Image Search and Tineye are useful tools.  Much better to find out ahead of time that the girl you are thinking of calling is using the pics from some porn star or model or that the pics have been used in ads from one side of the country to the other