Degree to become a cop? HELP!!?

ok i am at a junior college right now. i am thinking in a " AA" degree in psychology.. then get a "BA" degree in criminal justice cuz i dont think there is a matsers degree.. .. what kind of job could i get? example state trooper? cuz i plan on becoming a fbi agent after a few years of experoence. is this a good plan? give me some advice no haters please.. thank u help me!!