Agree with rad here. But another thing that could help with composition that i try to remember is this... since you are trying to represent a 3d would in a 2d medium you need to convey depth. This is done with light and shadow first and foremost, that is why golden hour (sunrise/sunset) time is king, it casts more shadows and therefore conveys more info to the brain about the shape of things. Next thing to try and do is to get something in your shot that can represent a foreground and, if possible, a mid-ground, and of course a background. Most people who try their hand at landscape get the background just fine, like you did here. But try to get something in the foreground, a bush, tree, rock/boulder, flower, anything that can be considered close enough to the camera/viewer to be considered a foreground. Now when you do this make sure you use proper distance/lens focal length and aperture setting to insure all will be in focus. Also if you can include something in the midground it sometimes helps out as well.
Do not center your foreground subject (well almost never do this, there are exceptions) instead try placing it in the frame off to one side or the other. If you can work something into the rule of thirds, all the much better, or even use something to form a leading line that leads the viewers eye to the subject. This could be a dead branch, a row of shrubs, etc.
Make a habit of looking at other's landscapes that you really like and you will find that these rules will often apply. This is what helps those images 'work' and it will help yours work as well.