Umm I’ll touch one point not mentioned by goldencub. Don’t squander your financial aid if you get any, and this is more in general to anyone. When I received my first checks, it was the first time in my life where I received a nice sum. I should have saved it to make up for the net difference to attend UCLA, which is 9k.
Other than that, build up your resume. Get to know your teachers. There’s no such thing as being a teacher’s pet here. And if you can see if you can grade from them or become a tutor. By your second year, try to have a CV ready.