How can I prepare for my upcoming SAT while I am in University ?

Hi there,
I know, I know… most of you will be surprised by the fact that I am in college yet want to do my SAT. Truth is, the college I went to did not have the SAT a part of its requirements, so I got admitted without taking it. However, I am planning to transfer to another university which has SAT as a part of its requirements. That being said, my current GPA in university in 3.76 and I want to maintain, but the thing is by studying for my university courses, ther would be no time left to prepare for the SAT. My SAT exam will be on January 23. Do you have any helpul strategies to which I could possibly take to prepare for both of them?

Also, I am sure you could tell, English is not my first language, do you believe that going through all the SAT words lists would help raise my score? I want to score above 1800.

Vocab can never hurt anyone, maybe try doing a tiny bit a random points in your day. 5 minutes at lunch, 2 minutes at dinner, and so on. It really adds up!