Be careful. . . remember the guy that set off from California to Alaska and lived in a bus? He had a forage book, but ate a plant that was simulair looking to what he "thought" it was. He ended up dying from it. I would also love to learn, but haven't found anyone in my area yet to teach me. I was able to locate a few thing that I was confidant on though. Some mushrooms and purple passion.
Try doing some research online to see if there is a class held close to your area or at least within drving distance. I have seen a few, but not in my state yet.