Just work on taking more science classes and doing well in nursing school. It's a very long journey. Do well in your nursing courses, try to be flexible and move to an area where you can get into ICU nursing right away, and start taking science classes on the side. Do well in those classes. You'll eventually need to get your CCRN certification after a couple years in the ICU, and also work on doing the GRE. During that process look into schools, open houses, specific requirements that they may have. Join committees and organizations, do foreign aid trips, try to teach something, become a charge nurse, do all of the above and prepare for the interviewing process. Be prepared for everything you planned to go to s*** and things to take even longer than initially anticipated.