Hi,
Since you haven't taken the BB course yet, you (most likely) won't be able to do/practice anything IPSC-like (with a holster, forward of the line, etc).
So, for now, just learn and practice "bullseye" type shooting. Basically, you need to be able to use your gun to hit the target you're aiming at - no time limit first. Work on accuracy, while shooting your gun. Try one handed, try two handed (maybe have someone show you the few two handed stances, and you can pick one which feels best for you) - it will all look and feel boring, but it will develop the basics which will take you into IPSC, and which you'll then expand on to get better in action shooting. That's the high level summary...

If you can put all your shots on an 8.5x11" paper at 15-20 yards, with no time limit, that's usually a very good starting point for taking the BB course. If you can do it under some (relaxed) time limit, like, say, 10 shots in 30seconds, even better. You'll go far beyond that in the course and in your competitions, but for now, just work on the basics...