Depending on what your interest in theater is, I always recommend working on plays. It's a great way to be introduced to the field, and also a great way to be seen by agents and representation. I'm also a great advocate for studying acting at a drama school or a college.
“People generally have sex fairly young, and probably younger than they should be having it.”
“I began playing in the senior circuit when I was 15 and won the world senior amateur title the same year.”