To answer your first question: There are only two points. 1. You can play. 2. You are rich in creativity.
Second: In fact, many musicians are self-taught. It doesn’t mean that you can master it by playing hard for a few months. Of course some basic knowledge is required. But there are advantages to self-study. Improve your own creativity in music. However, it cannot be denied that those who have been trained in professional knowledge are less creative. This is an era of innovation. Maybe Japan takes it several times more seriously than China does. So don't say how high your level is. Improving your creative abilities is easier than anything else.
The third question: Since you have chosen the path of music, let’s continue. If you study for 10 years just for fun, then it can only be said that you do not have high confidence in art. And he doesn't believe in his own abilities. Others' professional knowledge may not be as rich as your amateur knowledge. in turn. If you are an amateur, you may not have as long a lesson as them. but. This cannot be measured by time as a person's ability to accept. Maybe you will pay more attention to details? Many majors enjoy boring exercises with great interest. I think you may be freer than them. Isn't it?