Like guides, there are literally hundreds if not thousands of guide schools popping up all over the place.
I would recommend only two places to learn:
Royal Tine Outfitters (
www.royaltine.com) is a great way to start
and ofcourse the legendary Erv Malnarich
http://www.huntinfo.com/elm.htm
most places you need to be 18 and there' s lots of other hoops to jump through, but you' ll figure it out.
good luck and keep playing lotto