I live in the Chicagoland area. And I am only 16, but I wnat to experience with good actors except friends to make it more believeable.
Because i am low budget I am looking for actors to work for free. How can i find actors? Is there a site? Do I post wanted signs?

Look to your high school drama department and if you need older kids go to your local college and put up posters. If you need people still older go to a play house and put up posters- though if it's an equity playhouse I doubt any actors there will a- work for free or b- work with a high school student.

I think it's great that you're looking for actors and not just shoving your friends in the movie. However, you should know enough about acting to direct them.