ptcb.org. Don't know about the turn around time, but the earlier you start the better.
I'll second edenstarlite's suggestion. Without a license, the most you can do is probably volunteer (or if you're fortunate, get paid) to be a clerk. Still a good experience as you get a first hand look at the profession and what it entails, plus you get to talk with a pharmacist. Some people go to a vocational school to get their tech license but as edenstarlite said, you can just buy a prep book online or at barnesandnoble's and just study it for a couple weeks and take the test. I believe you only need a 650/900 or so to pass, so it's not terribly difficult.