For me, the best way to learn was to go through the CC3 User Manual (should be a link to it in your ProFantasy account) and just do everything they teach in there (without even expecting to make a map out of the exercise). By the time I was done, I knew all the basics - like the difference between sheets and layers. From then on it was just a matter of practice, experimentation and occasionally referencing the manual for tricks I forgot how to do. Also, keep asking questions here and on the ProFantasy boards.