I was in the school plays, I did a lot of music. I carried on through university for short films and loads of plays.
If you want to act, do school plays. If they're not there, create them, and the same with local repertory. They are the grounding for a lot of people. Make it happen.
I always loved singing. I was always trying to sing in school plays. I was in every one I could be in.
A good place to start initially would be school plays.
I feel like my early experiences of acting, and I think a lot of other actors' too, are probably at camp or school plays where you get to have great range. At camp, I remember getting to play a 50-year-old man.