How can you get in to acting at a young age?

I'm just a small town girl (not living in a lonely world) and I love musical theatre. I am currently in a musical at a popular theatre where I live but after the run is over what should I do? I am constantly looking for not far away auditions but when your under 18 that's kind of difficult especially when you are not in the Canadian Actors Equity. Can someone help me find an acting school or tell me how to land auditions? All answers are appreciated <3 :)