There is no "right" or "wrong" when it comes to composition. While there are a number of generally accepted principals including the famous "rule of thirds," ultimately, it is your picture, and it can be anything you want it to be. Two photographers can go to the same location at the same time, and each can come away with entirely different results since each has his or her vision of what is important in the scene and how best to express it.
It is your own "style" that ultimately dictates what your images look like. In order to find what works for you, start to experiment more when you are out shooting. Take some shots you know will work so won't need to worry so much, then relax and let your creative juices start to flow. You may be quite pleased at what you come up with. And if it doesn't work out, all it really cost you is a bit of film.