I am a very introverted person. My parents don't know me, which makes me very painful. How can I express it to them and let them know that I am an introverted child!

Generally speaking, what you are talking about is the inducement of social fear and the unstable factor of social fear. If you keep thinking about these reasons in your mind, even if your social fear gets better, it will recur. You can go out and find a job that suits you, and don't let social fears occupy your heart. As long as you feel valuable, your old confidence will come back. I believe you, come on ... if I want to be with you, I can have time to talk.