Try Rock Level One. It's not overly difficult and should give you a fair idea if you have the skills necessary, after years of playing classical.
Anders Mouridsen tutors both the beginner's Fundamentals, rock and blues channels so reviewing the Fundamentals won't hurt, either. Either path is an introduction to the electric.
So best of luck and let us know how it goes :)
P.S. I contradict myself; Anders teaches Acoustic and Classical, too. Very multi-talented.
Bram Stoker, as Dracula, once wrote, "Listen to them! The children of the night. What music they make! Or would you prefer the music of the Ainur? I'm inspired by the violinist in 'The Vampire Lestat.' Either way, let's listen!