beelen,
Your orthopedic surgeon likely will start you on what's called an interval throwing program when he determines that you are ready. From what I have read pitchers generally don't return to competitive pitching for about one year. Most importantly, follow his advice and do not attempt to jump ahead in your progression as this will only risk further injury. The good news is that the vast majority of HS/College pitchers who undergo Tommy John surgery return to a competitive level of play. Be patient and work hard on your rehab.