Um, CaptainJack, if you have a chronic fear of people, this is really, really, really not the right job for you. You can't just tutor -- you have to actually teach classes.
There is a form on the TPR website, but response to it is mediocre at best; it's best to just call your local office and tell them that you're interested in teaching.
TPR does hyperlearning, which means that you only teach one part of the test -- either physics, general chem, organic, biology, or verbal, so you don't have to be experts in all of them. However, most TPR science teachers have scores well above 35, and are sort of experts in whatever they're teaching. Most offices want you to have a 13-15 in your section, but many will let you take a practice section instead if you're close to that.
After training, the time commitment is usually about 6-10 hours a week, but depends on how much you teach. Training is a little long and intense.
You make good money -- I think our office is starting MCAT at about $20-25/hr, but it varies regionally.