Yo, as long as you're in the Quest for knowledge you're on the right path man. I gave this advice in a different thread, but the best resource for a beginner is to pick up a lettering book from your local craft store. These how-to books are aimed at little girls, but there are seriously some good resources to be found. Honestly that that will be the most helpful tool at the very beginning. They teach you how to break down letters into basic Strokes which you can then flip into a graffiti style as you see fit.