you need to get experience and take acting classes and get an agent.
if you want to do this seriously you will need to go to where the work and interviews are which is L A or N Y.except for a few open calls you will need an agent to get on anything. it does not cost to get and agent or to find out where interviews are. it is a little expensive getting started. and this is going to take a great amount of time and commitment. a lot of agents and managers hold classes, you can take a few and the instructor will be able to tell you if you have potential
or not.look through your local paper for any local theater auditions
you could try for or student films if there's a college nearby with a film
program.