I have always wanted to study physics. When I was in high school, my guidance counselor told me it would be a waste of time as I would not get a job. So I settled for another major. I have a job and I'm getting a masters in communication (another field that catches my interest). Now I want to pursue what I wanted before, as my interest has not changed. I have been studying independently but as I work full time have not learned everything formally. I have 2 years to finish this masters and I wish to pursue a masters program in physics when I am done with this masters. What courses , topics should I know to meet the requirements for a physics masters? Could someone give me an order from the most rudimentary subject I should know to the upper level things I should know. I want to use these 2 years wisely. Thanks.