I didn't really use tutorials since I actually took a class from school.
and the flash at school is old, I used Flash MX 2004.
Flash is basically a vectoring software. The scripting and the codings and coverting them to movie clips, pictures correctly are the hardest part.
This site does cover alot of what I have done though.
http://www.entheosweb.com/Flash/default.asp
I dont know if you've decided which one to go with. But I suggest flash. Yes, game maker is easier to use. But in the future, you cant do much with it once you have mastered it except make some cheap 2d games. With flash, you can program web sites, software, games, and tons of other things.