Hey Jim,  I'm not doing the Rock course just yet, I'm in the Level 1 Blues course, but I would imagine they are similar as far as lessons and pace.

What I like about this site / system, and I've said it before, you go at your own pace. If you have to slow down the lessons (see the settings to the left of the lesson screen) or watch the same lesson 5 times, so what? You can do that.  There is no time limit and no deadline as to when you need to have the lesson fully learned and you don't need to keep pace with anyone. You just do what works for you.

I think once you find the pace that works for you, the lessons will become easier and you'll get thru them quicker.

Have fun

Lou