I have worked with CCM 4.1 for four years and now I will work with CCM 7. how can get information?.
I would start here:
Most of the basics and your knowledge will still be good. Menus are different but elements are the same, with some time you'll get used to it.
I would recommend you to start reading the features and services guides or the admin guide for the topics that were not in windows versions and you want to start using.
if this helps, please rate