There is no natural self-confidence, only self-confidence that is constantly cultivated. Perhaps most people will have this kind of psychology, but in order to work and live better, we must overcome it. You don't have to be careful, you can find your own shortcomings and want to overcome them. It shows that you are a smart and enterprising person. Learn more, strive to improve yourself, actively participate in beneficial organizations and activities, and communicate and interact with friends and colleagues. Soon you will be "another flower village in Lu 'an". A person who dares to criticize himself can never be a bad person. I believe you can be a brave man and a strong man in life.