No, I don't need lessons. Even as a teenage would-be guitar hero I quickly figured out there was a clear difference between blues-based hard rock like AC/DC and the (apparently) more classically influenced compositions of the aforementioned Richie Blackmore not to mention Iron Maiden and (even more far removed) Slayer. I'm sorry, but the blues influence just isn't there. The guy who gave me lessons played in a metal band, and he borrowed material from flamenco music, fusion jazz but never the blues.

Unless playing with a plectrum and using barre chords and single-note runs are soley derived from the blues, then I really don't think that "the basics of metal guitar all come from blues guitar."