A good start is to read your manual. Yamaha has done a fairly good job as manuals go. The initial section helps you to get up and running. Learning a small section of the T2, a little at a time, will help you begin the demystifying process.
The beauty of the Tyros2 is the fact that with the "cockpit" a tremendous amount of music can be played.
There are other informative boards you can subscribe to that have numerous helpful posts. Good luck and don't be afraid to ask specific questions.

Bob