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The navigation is a bit small for a bold text. It seems a bit squished. I would increase the size a bit.
The logo should be much larger. It gets swallowed up in the large green header.
It's very unclear what the boxes below the navigation are. Are they an extension of the navigation? Are the blog posts?
The blog posts need something to separate them. A border, alternating background, etc. As of now they blend together too much.
Overall it seems like you definitely have potential for this site, I would make sure that you make it clear to the user where he/she is supposed to focus and go.

thanks again for the suggestions
JS