How to adjust the e-brake on a 2001 Pontiac grand am GT?

I have a 2001 Grand AM and just recently I went for a test drive to make sure that the brake was working properly and sure enough it wasn't. I had a friend push the car in neutral and I pulled up the brake to stop it and it just kept on rolling. I've read several articles on how to adjust the brake, but would like more specifics (if you could) on how to do it. Treat me like a rookie because that's all that I am. I just don't want some overpriced dealership to charge me saying I need a whole new brake line when really all it needs is to be adjusted. (I'm pretty sure that's all it needs, because whenever I pull all the way up on the brake it does not get tight and I've heard it should get tight after 6 or 7 clicks.