Learning Guitar

I find these short Guitar World videos with Testament's rhythm guitarist, Eric Peterson, interesting.  But calling them "lessons" is a real stretch.  Unless I'm just such a beginning guitarist that it's just way above me.  I do like what he's doing, though. I'd like to just be able to get that tone.  Or even the simplest progression example that he's doing. Or even the basic do-do-do (below) that you hear so often.  I guess that's where having an actual instructor comes in handy.