The city where I live has a musical instrument lending library. I don't know how common these are? Ours started when a cherished local musician passed away and his eclectic collection became the library. Over the years, more people have donated instruments and there is an annual festival to raise funds for their upkeep. (As a local musician, I'm actually playing at said festival today.)

Anyway, it works just like a regular library. You get your library card and check out an instrument and it doesn't cost you a penny. And there are all kinds of videos online these days to give you pointers on how to play. I guess if you get really serious, you'll probably want some one-on-one tutoring, but if you're just doing it for kicks and don't have any plans to join a band or whatever, you can just have some fun and see how far you can get on your own?