Gustavo,
I know this thread is a few months old now, but if anyone else reading it is interested in how a CCR is structured then i can share my experience. I was first certified on an Evolution. I did about 8 hours of classroom type stuff and we did 8 dives on the unit. Then, a year later I crossed over to a Meg and that wasnt as intense since CCR fundamentals were already there. That was 2 days, not much classroom mostly diving the unit and learning it. You can really do most of your reading before class, pick up the books and read them a few times. It will make so much more sense later.
Enjoy