Criminal justice/ Police officer career with misdemeanor? !?

I have one misdemeanor of unauthorized use of motor vehicle on my record, however I want to go to school for criminal justice and maybe become a security officer of some sort. Would anyone even look at me because I have this misdemeanor? It happend at 18, im 21 now. I need to start something with my life and the only things that interest me is computers./technology and security And I dont wanna sit in front of a computer all day..