hello and welcome to the fourm, first off you never play with anothers submissive with out their Dominants consent. Also many subs most likely would have hesitations with allowing an inexperienced Dom do many things to them ( some of our play if done incorrectly can cause damage some of which might be perminant) What I would suggest is for you to find your local bdsm community ( I know WNY has a pretty active one depending on where you are located and willing to drive to) go to Munches and Meet and Greets, get to know people, I believe that you will find that the local group also does demos, go to these see the activities preformed, ask people how and why they do the things they do, gain knowlage before attempting to preform on a live person. I hope this helps you a bit ~Wyked~
P.S.
APeX (Albany Power Exchange) in the Albany area is a very active and informitive local group you might want to check out.