Hello Sansan, I am currently a freshman in high school in the United States. I came here three years ago and I think I can help you. America is a paradise for the strong and a hell for the weak. If you want to come to the United States to study, your English must be good, otherwise you will be scolded and you will not know anything. It is best to have a cheerful personality. Even if you are introverted, you must have friends in the United States. When it comes to striking up a conversation, just find a female classmate you like and follow her around. Have dinner with her, do projects with her, etc. Of course, the premise is that she doesn't hate you. If you have someone to protect you, no one will bully you. The topic is arbitrary, just personal preference. Americans are generally better at sports than Chinese, and not being good at sports has a big impact. You have to have a good sport. Those who are not good at sports will be isolated here. That's all, I hope it helps you~