I have two more years in high school left (junior now), and we are constantly told to search for universities/colleges... I still need to worry about the SAT exam and other curricular exams. How would I map this all out?

This is exactly why there are High School Guidance Counselors to help you figure things like this out from where to start now and eventually get you started on your way to wherever it is you want to go so go talk to them and good luck