Most of us learned these moves on the original workouts they were taken from and from past cathe cardio workouts. You are having difficulty because you do not have much experience with her cardio, and because you are starting to learn it with a workout which is deliberately formed to be an incredibly intense experience. You have jumped straight into the deep end, as it were, before learning to swim!
The easiest way for you to learn these moves is to step back from the terminator for a while and acquire some of the cardio workouts these moves came from.
Flying Angels are first introduced in Step Fit and mambo/cha cha moves first come in on Rhythmic Step and Step Blast.
Youmight then helpfully invest in several workouts to make your life easier and also add some fabulous workouts to your workout library: the Rhythmic Step DVD, Step Blast DVD (Body Blast DVD 1) and the Cardio Hits DVD.
Clare