Damian,
Flash is not that difficult, but, IMO, you should try to use Flash MX2004 Professional Version 7.2 and not the newest version. The new version is not compatible in some cases.
Here is a good book FlashMX 2004 Hands on Training ISBN 0-321-20298-8 - it comes with a CD.
The key to Flash is action scripts. Those can be fun, but complicated. Here are some good books
Flash to the core by Joshua Davis - my hero
Action Script for Flash MX
A few pointers,
(1) use layers
(2) label everything
(3) use movie clips verses buttons or graphics
(4) Change your settings to publish for Flash Player 6.0
I am sure others have more experience, but that's my 2 cents.
Enjoy!