If you have it loaded, I have found the online documentation to be a fairly decent starting point. It's contextual help will allow you to get help by hitting F1 while in a command.
It also has sample parts that you can open as read only which will allow for quick learning. Good Luck!
In addition to the great online tutorials for every product, a secondary documentation disk has pdf manuals for the products which you can print and study.
My recommendation for inexpensive tutorials starts with "CATA V5 Workbook" for R8 & R9:
