Hey Guys, i just recently found out that Adobe Flash came with my CS4. I'm extremely excited to use it, but i'm afraid i don't know how

I don't know how to animate in it, but i heard its extremely easy, but i'm not sure because i have no idea how to use it!
There are these options on the page when i open it, and this is what they say:
Create New Flash File (Actionscript 3.0)
Flash File (Actionscript 2.0)
Flash File (Adobe AIR)
ActionScript File
ActionScript Communication File
Flash JavaScript File
Flash Project So i don't know which to pick! Does it matter?
If anyone has any advice on using Flash CS4 or any older versions, let me know, or any tuts, it would help so much! Thanks!