Forget the CBT - you'll get quite enough of that on a course. No good walking in with a negative pavlovian reaction well established.
There are many resources on line but we particularly recommend the 737 Technical site. Long established and highly respected:
Try
http://www.b737.org.uk/aircraftsystems.htm as a taster. Click on the flight controls section - puts it all together in a way that really makes sense rather than Boeing's approach. Should keep you busy for a while.
Regards
rob