I think the Ctrl+Paint site I posted might have some helpful things in its 'digital painting 101' or 'strictly digital' sections?
Ctrl+Paint : Digital Painting 101 (Photoshop)
Ctrl+Paint : Strictly Digital (Photoshop, Google Sketchup)
Might need to search around a bit to get to ones that start where you are and make sense in order.
Here is also a photoshop tutorial specifically for using the program as an animation tool:
by Alex Grigg (Photoshop, Animation)
Unfortunately I don't know of any other photoshop specific tutorials off the top of my head. The best thing I can suggest is to just mess around with different stuff and see what does what until you get used to the program, and then when you find yourself confronted with a specific problem you need solved or find yourself continually running into the same bottleneck search for tutorials or solutions for that specifically. I may do an expedition into the internets tomorrow for more things to post in this thread.