What did you guys do while you waited to be 21/Before policing?

Currently 18, want to be a cop but my state requires all municipal police to be at least 21. So I’m looking for things to do in the meantime, whether it’s a job or college. I’m thinking I might go to college for something unrelated like nursing or education, so that I can do that after my retirement or if I hate policing I can go and do that stuff. What did you guys do and what do you think of my idea?