Hey,
I was asking ( although not on this board ) similar questions about 6 months ago.
I'd reccomend you to start with
THIS SPONSOR
some time ago they were voted the best adult sponsor and althouh they're the most popular sponsor, they still convert pretty good ( at least for me )
+ and what's important for newbies - they have a great customer support and a great message board...
but regardless what sponsor you use, you have to work hard ( at the beginning I was spending even more time on reading articles and searching through message board archives, than on creating and promoting websites ) and than you'll see your first sale, first check etc...