ok. lets see. I would check the stance thing first. Joe said possibly left foot forward, and your saying right foot forward. Do you know the quick test for stance. Stand stright up looking straight ahead, close you eyes, and have someone push you from behind. Which foot goes forward?
Generally speaking that will be your stance.
If its your right arm that you cant use, hopfully your l.f. foward. That will prevent you from having to ride cross body. If your goofy. r.f.foward, then you will have to ride cross body, which can be done, just requires a little more arm strength and practice. When starting out from a deep water start, I generally pull Lisa slow in the beginning from the hole shot and that way she can get the board positioned easier and pointing in the direction she needs to. The start is generally the same , but just slower that way the rope doesnt pull extremely hard or fast. How is your arm strength? Lisa kinda gets tired fast, and thats because she doesnt really work out her good arm enought to build up the strength to ride a long time. Riding one arm is pretty much the same as two, just a little harder to ride switch.
(Lisa is working on that every time we go out riding) Joe can give you some pointers since I can tell he can ride, just remember that its all abalance and body positioning. Same as when riding two armed. Ok. my fingers are tired from typing for now. I am sure there is alot more I can suggest, but I can type more later.