Anything, really; whatever gives you a chance to act. At this point, you need to start acting as much as you can, anywhere you get the opportunity to. It could be community theater, drama clubs, amateur acting workshops, student films and so on. If you’re lucky (or unlucky) enough to already live in a bigger city, there’s going to be a lot more stuff happening, but it’ll be more competitive as well. Nevertheless, actively seek out jobs, audition and do whatever you can to get up on your feet and simply act. As soon as you can afford some local acting class or workshop, try that as well. The goal is to start building that resume in any way possible. Put anything you can on it. Jump on any project you can. Be proactive!