Any 360 Viper players want to spar?

I want to pick up Viper, but it would help a lot if I played other Vipers. I should warn you though, im very bad at the game. Well, not terrible, I just dont know OS, and other basics yet.
Also, does anyone have any tips for her feint combos? Whenever I try to feint after a move, to do a combo, an ex comes out, or it will faint, then the ex comes out.