Your free classes are at the "Forecasts" Page.
If you have purchased other classes you will see access to those classes where the Icons are in color. The "greyed out courses" are not yet available to you.
I would also recommend the Platinum Pass of Courses - where you get 8 Master Classes, at a huge discount. Only for registered members.
MASTER COURSES – I
MASTER COURSES – II
OTHER INTRODUCTORY COURSES