When i joined this board i was new to everything, I lurked for awhile and read from both clients and providers. This forum is a wealth of information, and the people who populate it is as unique and varied.
When I message a provider, if the answers I am looking for can't be found on the boards, I am very succinct in what I want and what I am looking for which has served me well.
Ie:
Hello my name is SCM, I saw your ad on XX. I am into insert kinks/fetishes/etc etc (by stating what you are into rather than asking the provider what they will do seems to be a better tactics from what I read on here.. lower chance of the provider thinking your LEO or some such). I am interested in an Incall ( or simply asking if they can host.. or come to me etc). What are your session rates.
This is the format that others on the boards have advised on... 😛