Not that bad.
You don't have bad ideas, you just need to improve on a few things:
1- Try to make the characters walk straight on the ground, because sometimes it looks like they are kind of floating.
2- Try to make the animations a little more realistic and smooth. Getting the hang of timing and speed is a must.
3- Make different camera angles. Things like zooms and such can improve the flash a lot.
4- Be careful when you use sprites because you tend to stretch them more than necesary, thus making then look unnatural.
5- Be careful where you place the sprites. Make sure they are all in place and that they look good.
6- Practice, practice, practice. Just try different methods and framespeeds, different speeds betwen the sprites in the movie clips.
With this you can do something decent =)