Being the workshop sponsor, I will say that my answer is probably biased, but here goes anyway...

I think even if you are a newbie, you should try it. Like Darcy said, you may feel overwhelmed. If that happens, sit and take notes. I don't know how much of the stuff she'll cover is also on the videos that GC has put out, but maybe you would catch something that isn't on there that illuminates the whole movement. (I've found that it really helps to take workshops even if things are on videos because you can ask questions...)

Personally, I've taken several workshops where I'm in over my head. If nothing else, I've come out with a greater appreciation of the style (I can think of Saidi one where I got my heiny kicked from one end of the room to another by Faten Salama...) as well as knowledge of where I'd go to learn more. It helps you to be able to recognize and distinguish what makes a good dancer from a bad. Incorporating that knowledge in the long run will help you to be a better dancer...and possibly a better teacher if you live in an area where there is need of one.

I will say, though, that if you don't handle frustration well, maybe it would be better to wait to take a workshop like this. You'll be drinking from a firehose, and sometimes your body may just not get what it's supposed to. If you find that frustrating and wouldn't feel good taking notes, then maybe doing something like this another time would work better.

Just my thoughts...

Cherish