PRACTICE, PRACTICE, PRACTICE...:7 :7 !! Step is challenging to learn, and I have to tell ya you picked a hard one for your introduction. The Imax's have very little in regards to choreography "break down". Because her step segments and cardio segments are so short she doesn't have the opportunity to break down the step segments for someone who is trying to familiarize themselves with choreography. I would highly recommend her Basic Step routine and maybe the two older DVD's, Cardio Hits and The Classics. From what I can remember the step workouts on the CTX DVD aren't as high on the difficulty factor.
Having said all of that what it all comes down to is practice. I wasn't new to step when I started Cathe, but I WAS new to HER choreography. I just kept plugging in her DVD's and doing them on a regular basis. After a while you realize you are doing it and not having much trouble following her cueing. The hardest part for me was figuring out which direction I was supposed to be going in especially when she would do moves that took you to the other side of the step facing away from the tv.
You'll get there you just have to keep practicing. And it has been suggested here that a good idea is to get your cardio workout in for the day and then plug in one of her step tapes and just focus on learning the choreography without having to worry about it also being your cardio for the day. This takes away alot of the stress of learning it.
But again I would definately suggest her Basic Step DVD. I'm sure others here will have some suggestions and maybe even some more instructors tapes that do a good job of breaking down the basic components, minus all of the trickier choreography.
Keep it up and good luck!!!
Deni