What are the procedures for college students to immigrate to the United States and apply for universities?

Have you decided which city to go to? Continuing to study means transferring schools, which is more difficult. Let's take the SAT there and then go back to the undergraduate course. If you pass the SAT, you can apply to some better universities. School transcripts, SAT transcripts, letters of recommendation, personal statements and so on are all materials for applying for schools. But you should decide which grade to read according to your grades. I suggest you take the TOEFL. After all, language is very important if you want to live abroad!