This is a photograph with a diagram of the Rule of Thirds imposed. The rule is often overused but if you are a newbie photographer it can help a lot to achieve a better composition. When I began photographing digitally quite a few years ago, it helped me to superimpose the grid on my live view image, so try it and see if it helps with composition.
This image was taken with the same aperture and focal length, but with the 5 stop ND: the time was 150 seconds.
Who says you can't use bulls eye images, and have to keep things out of the center? If a subject is round, it works well.
Remember that while it is a good idea to keep the horizon out of the center of an image, sometimes with reflections it is best to keep the horizon dead center.
Balance is very important to an image: light and dark must balance and act as counterpoint to each other. Look at Rembrandt's images, he is the master of chiaroscuro...he placed light where it was important, yet maintained dark to balance the image. This image has light behind a seastack from the sun, but the dark, larger shapes on the left help to balance it.
Try to incorporate some of these ideas in your images, or not if you choose...but work to improve composition every day; be creative as a child again.