Reddit reviews Digital Art Photography For Dummies

You might want to consider the rule of thirds when taking photos. In this case the most noticeable part of the image appears to be the cat's leg, which is pretty much centered. Ideally you would like to have something of interest in other areas of the photo so that the viewer's eye is drawn away from the center.

If you enjoy taking photos then pick-up a beginner's book on photography, preferably one with a lot of photos you can examine and learn from. I've recommended Digital Art Photography For Dummies to a few friends and it seems like a good place to start, though you could also just peruse the shelves of your favorite bookstore for something which appeals to you.