you have bought a very good camera so very very goods photos from your side are expected.
Considering your photos and beeing your early days since using I thing you are learning but there are some obvious problems you've had.
Pay attention to your focus as some images were without concrete focus. Do not know what happend with #1 as this one is completly blurred....maybe slow shutter speed.
If you are not planning to do PSD on your images than try to adjust camera to make photos little more saturated, more sharper (some photos are too soft).
Hope it was good for start and also want to tell you that I've just bought Canoneos350d with problems at the begginning like you but soon will be behind you.
Hope to see more of your photos soon....