Chris,
I attended the online Clearpass Essentials class and also the Advanced Clearpass training, which really helped. I would make sure that you understand how to achieve all of the goals from the 5.x study guide in 6.x. Next, I would make sure you understand how enforcement profiles and policies are defined, how to put together a service definition, and the mechanics of OnGuard and OnBoard.
It sounds like to me that your real world experience will help you win the day. Best of luck!
-Mike