Heya Joepo, welcome to ThePhotoForum and congrats on your new camera! You will enjoy it!
What settings are you using now that it is still new? Auto?
My 350D tends to overexpose on Auto, and the first two look it - all three of them seem to be overexposed, though lighting was quite difficult in the last and the weeds are but the lake is too dark ... which is why I suggest you get yourself acquainted with the manual settings soon to achieve better results, exposurewise.
The first is a nice attempt at finding an unusual POV (point of view) but for me it still does not work quite that well ... while the second is quite cluttered ... you will soon go further away from your home to find yourself subjects to photograph, I assume, and you will then find more interesting places. Let us see your new results then, will you?