You know, I had Hype 2.5 for a while, played a bit with it, forget all about it, then at some point realized Flash was on its way to the grave and picked 3.5 up, only to realize I had forgotten everything I had learned myself.
So I gave myself a speed course Hype by going over to Lynda.com and that, for only 25 bucks, made a tremendous difference in my understanding of Hype.
So much, I can recommend it if you're just beginning with Hype. Other then that, there is a wealth of information to be found here and in the documentation. Download a bunch of Hype files and pick them apart to see what makes them tick.