Some people took the initiative to chat with me. But I am an introvert and dare not speak louder (I was once laughed at by my friends)

As others have said, if you talk too much, you will miss out on what you should say and what you shouldn’t say. You are not engaging in pyramid schemes and brainwashing. In addition, speaking in a low voice is a quality, while speaking in a high voice is disliked by people all over the world. But it is necessary to cultivate your own expression ability. First of all, read thousands of books and read a lot of books. Secondly, don't be afraid of saying the wrong thing. In fact, everyone is the same and no one is completely right. Over time, you can develop a strong mouth.