I have been using C2 for not too long now, and this is what helped me got started.
The manual and tutorials are a wonderful place to start as Jobel has mentioned. There are many video tutorials as well, which should help you get familiar even faster. Also look for a set of video tutorial from Yann and Kyatric. It is really a fantastic set of videos that will help you get to understand most of C2's functions and how it works, while still being entertaining!