Site Critique

hello,
heres a design i did for a local youth group, and i was wondering what i could do to improve it. I’m starting to think the header and the content arn’t really matching style-wise, and that i might have overdone it with the grunge look. Also, there’s a lot of empty space on it right now. Is that something that’s taking away from the design? Also, any other comments/critisisms welcome. ok, thanks.