Advice on how to meet girls?

Hey everyone I have recently made a lot of changes to my life and in a way kind of feel like I am starting over. I am 20 years old and a fire science major at my junior college. With these changes I am also having to make a completely new set of friends. With this I would like to meet a girl I can have a good long term relationship. What are good ways to meet a girl like that? I recently stopped drinking and drugging so bars and nightclubs are not an option as I have to stay away from those places to change my life and achieve my goals