Hi Muggleone!
Yes, there are many, but not here. Cathe's step videos are for advanced exercisers. But I stepped for my very first time to Cathe. I think the reason I was able to start stepping with her right away was that I had been exercising for 8 months regularly and I had some fitness level built up.
You could probably work on it the same way I did, using this tape (not feeling that you have to do the exact same thing as the people on the screen) and rotating it with some lower intensity tapes with "easier" choreography.
Cathe's cuing is so good that I find her choreo. easier to follow than many other instructors'. But there are some out there who do compare.
I am not familiar with them though, someone else will be able to tell you their names (not Christi Taylor, her choreo is even slightly more complex)