Frist this analyse your self level. It more important thing. If analyse your self you will check and improve your knowledge. So don't demotivate your self. That is improve your self, If not believe your self you will be not improve. So analyse your self then will be know about and what we will be improve the next level process. Knowledge is improve this for everting.
Self-confidence is absolutely necessary for everyone, but what is more important than that is being self-aware when we already know that there are still many shortcomings that we need to correct and work on ourselves through process and experimentation. Because if someone is not aware of their own shortcomings, of course it will also be difficult for them to make changes, especially if that person doesn't like reading and also doesn't like increasing their knowledge in areas that they haven't mastered properly.