There is a ton of information on the site, especially in the students and novices board, about how to get started.
You don't tell us where you're from-- generally speaking-- are you in a large city or a small town? Are there a lot of theatres in your area? Are they mostly non-union or union?
And, are you interested in eventually moving into doing theatre AS a day job? or are you just looking for a hobby?
Please check out the search bar on the top right as well. Some other features the site has: BTDT (Been there, done that)-- you might find some people who have worked at places near you. The internship database-- Check out some reviews for official internships and apprenticeships at theaters you might be interested in.
And, of course, feel free to keep asking us questions!