Could anyone suggest Cathe videos to start with. I'm new to Cathe's workout. I've been working out for years, but her videos appear to be very advanced. I have the Cross Train Express Series, but I'm having a hard time following some of the footwork on some of the step portions. Those heal toe combinations on the step are driving me MAD!!! I can't quite get them. I figure if I try something easier, I will eventually get it. Please help.