Decent blog - and good theme but I agree you'll need to develop some more content quickly and get a better header/banner
More posts and more gadgets is what you need to improve upon. Some more pictures will do as well! What you don't need to change is the Theme! I like it very much. Clean and nice!
As you just started it, it will take some time to look better as there is few posts. Try to give some more widget into it.