Go to http://www.posemaniacs.com, click 30 second drawing. Start a new TVP project. And start drawing, draw every new pose into a new frame. That's it.
You may also want to use the recording panel to record the whole process.
I know it is not nearly as good as the real thing, but works well as a warm up, and you'll be getting some unexpected angles of the poses. I mean how often are you under a glass table drawing people walking on it?
My tip would be to use a big bigger brush and less lines than I did

http://www.youtube.com/watch?v=ZVix8eGhoho
have fun!