How to immigrate to the United States without an economic foundation?

Immigrants don't need to take the TOEFL, but they must take it when studying abroad.

You are a freshman. Take care of your studies first. You can find a good job in the future and study abroad when you earn money. There are very few skilled immigrants in the United States now, unless you find a company to hire you, and then the company will apply for you. If you want to hurry up, marriage immigration, I still hope you can focus on your studies. It's hard to say what will happen in the future.