How to improve your skill in GUI drawing?

Question

Adobe Photoshop

Hello!
I know photoshop well enough, but due to ignorance of some design rules or something else, I can’t make beautiful GUIs for games! They can take something ready to move, but they can’t create their own beautiful.
For example, how to learn to draw like this?

Maybe there are some useful articles on how to develop a sense of this taste or some principles ... maybe there are some galleries with such designs where you can draw inspiration.