I am introverted, have difficulty communicating with others, and even feel fearful. Who can help me with advice? I'm 23 years old.

From your description above, I know that you have understood psychology, but it is just a superficial understanding. Based on this, you judge yourself as social anxiety and depression. In fact, do you know that these terms are just for a person? Description of the state, and life is not always smooth sailing, especially in an era when society is changing so rapidly. The change and continuation of any state depends on one's own will. You will do whatever you want. It is a person's inner power that dominates a person's thoughts and behaviors. It is understandable that your childhood trauma has had a serious impact on you, making you feel lonely and scared because of the lack of a safe and warm embrace, but you are now 23 years old, and you are no longer the weak child you used to be. An adult man with thoughts and autonomy should give himself a ceremony to bid farewell to the past, re-plan his future, and work hard for it. In addition, you said that you are not good at communicating with others and are afraid of leaving a bad impression on others. In fact, have you ever thought about how to be good at communicating with others? In fact, really good communication is not about leaving a good impression on others, but about being able to capture the real information, that is, effective communication. And this is not something that needs to be shown to others, nor is it to please others, but for yourself. The ideals and goals of the people should strengthen their own direction and improve themselves. Everyone is equal. On the whole, there is no one who is better than anyone else, and of course there is no one who is worse than anyone else. The emergence of good, bad, strong and weak is just the result of unreasonable comparisons, because everyone grows up in a different environment and has a different life. Different paths will lead to different strengths. To develop and improve yourself is not to learn and compare with those who you think are excellent, but to find out your own characteristics, make them the starting point of your own strength, and constantly improve and develop yourself so that you can Become who you truly are, not who you are in the eyes of others. The old professor's method is feasible, but you are unwilling or even afraid to face yourself and have been avoiding it, because facing it makes you always feel that you are inferior to others, and this feeling makes you uncomfortable. From now on, face yourself and admit that you are not as good as others, but you will definitely be outstanding, not in the future, but in the present. Go and explore by yourself slowly. Any experience in life is precious. The key to wealth is whether you want to use it properly and take action.