If you are really dissatisfied with your image, you can try to make some changes. But the so-called change, should be based on their own actual situation, to find a suitable way to change.
The so-called simplicity depends on which stage of your life you belong to now. If you are studying, then think less about it and calm down and study hard. When I grow up, I will dress myself slowly, and naturally there will be amazing changes. If you have already worked, it depends on whether you are satisfied with your current image and whether your image will affect your work to decide whether to change. Sometimes, don't care too much about other people's ideas and try to make your life a little easier.
Here are two famous words by Oscar Wilde: "It is necessary to pay attention to dressing up. This is not the case with life goals. " "There are many beautiful faces in this world, but few interesting souls."
I hope my answer can help you.