How do I meet decent people my own age?

I'm 21 years old and I'm not wanting to make a love connection or anything just make some friends I haven't had a single friend since I was 12. The most social my life has been was I took my 84 year old coworker out to lunch last week. And I talk with all my coworkers a lot and love all of them but everyone I work with is at least 40 with kids and grandkids so not like we hangout. And even if I meet people my age o I don't know how to strike up a conversation with them let alone asking if they want to hang out
How do I meet decent people my own age?
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