If you want real constructive critisizm, here you go.

The first MAJOR problem I see is the top navigation, what are you using green for? why are the links so close together? I would recommend buttons, of if you are going for text rethink the font

the pattern is kind of tacky, I see no real defined content area. I would also recommend making the right column a left column. the icons don't match either.

please, please rethink your color scheme, black pink and ugly green just don't cut it.

Other than that, it's good for a first attempt.