X100 to what everyone said. I tried bark/rind grafting this year and had almost 100% success. The only resources I had were from the google machine, stephen hayes videos, and the helpful folks on here. As far as the different types of grafts, I'd say look online or ask around on here to figure out which graft is the best type for your situation (e.g. do you already have trees, or are you trying to bench graft?).