Help to start!

hello there!!!

i would like to have a piece of advice…

i have chosen to create a flash application for my thesis.
i have never worked with flash, though i would really like to learn.

so, the problem is that i don’t know how to start!!

i have started watching the lynda videos about actionscript 3.0 but i cannot go further and do something in practice.

i need some help to get unstuck from this point!!!

thank you in advance flash masters!!!