Since you're playing BBCS:EX/P4A, if you haven't already, check up with the character's challenge mode. One, it shows you your character's specials and what kind of combos they have in from basic to advanced, and two, this is the biggest factor of if you decide to stick with the character or not. While those combos aren't optimal, it's that baby step that you improve on after becoming familiar with them. Also, it is important to be consistant with your combos rather than go for very fancy ones, as if you drop one of those, it may end up spilling regret. Another thing is that once you are familiar with the character, ask for a set of matches with another player of that character like Osuna has mentioned who can teach you how to play and etc. Those few steps I would recommend to start off with first. Everything else can be added once you become more comfortable. It's all about the baby steps and just playing more.