I think what is being said is you would have a better image with a longer depth of field (DoF). Your aperture is set too fast, so you have a shallow DoF. With a slower aperture, you will need a longer shutter speed and a tripod, but the added DoF would improve these pictures.
None the less, nice first effort. Composition is just as important as good technique. Keep practicing, and check this out:
http://www.e90post.com/forums/showthread.php?t=277439