Hi, it's quite nice...
Can you please try to put more space at the content section (more padding). I think it maybe help, look clean and easy to read...
Ummm and the sidebar Links, Categories& Archieve, maybe you can make heading a little bit difference from the menu... and also chane "-" to use image eg. bullet image or arrow...
Cheers ^ ___ ^
PS. maybe you can findout some examples that similar to yours then try to borrow some idea, for the beginning.