Dear Siobhan,
I'm afraid I'm going to disappoint you now. While I think all your questions are very valid, I am not really sure this is the right forum for these answers. Your question belongs more on the general discussion board, or better yet, the "Providers Only" board. You can also address the regional board where you will work. It will give you an opportunity to perhaps establish relationships with other providers - THIS IS A REALLY CRUCIAL TIP, by the way - and it will also give you a chance to connect with hobbyists in your area.
I will say this: from what I have found, there are some general provider issues that apply almost in every city, and if you get in touch with some kindly providers out of this board, I'm sure you will get help. Many issues, due to the various modi operandi employed, however, are more city-by-city based. For instance, in Los Angeles, the majority of providers use their own vehicles for transportation. That in itself carries a whole set of conditions. To give an example: should you valet park in a hotel or park somewhere else, in case you need to exit the hotel quickly? What happens if you get stopped by the police and you have a big wad of cash in your purse, possible drugs, etc. in your car? I'm just making an extreme type of scenario here, but it has happened [believe me on this one.]
Now in NYC, this probably would not apply to the same extent. You'd either have a driver (another very particular issue) or go by taxi to your appointments. Then we have the monumental issue of incalls. How is the building configured? Are you in your own home? If it's LA, chances are this may be the case. If it's NYC, maybe you're in an apartment. Is there a building super or reception for the client to pass by? These are just examples, and there are a plethora of other things to consider.
And then the screening issues. Oftentimes, I have observed that each provider has her preferred screening methods. To go through them here is not really an appropriate forum. This board is more directed toward issues that carry emotional weight. Not that your's doesn't - you are nervous, of course - but you are not asking how to deal with your emotions, you are asking for practical tips and work related matters, which could be chapters out of "The Escort Manual."
At this time, without performing some "electronic withdrawals" from this thread, I would respectfully ask hobbyists and providers who feel inclined to respond to Siobhan06: Please have her message you privately. Her question is very valid, but it belongs on another board.
Good luck,
the Love Goddess