Don't let the fact that you can't do all the movements deter you from coming to class. Most people in some way shape or form are modifying the workout in every class. We'll always find a way to make it work.
The safety squat bar is a great example of a simple modification.
3 x 2 Back Squat
5 hang power clean (95/135lb)
10 front-rack lunges
200 meter run