All I can add to this is, 28 years of practice has got me to the point where I can shred...although I'm not a classical type shredder. What I would suggest is learning an easier scale paradigm such as the pentatonic scales, which is my meat and butter. Most Pink Floyd is pentatonic. From here you can add some modes to the pentatonic scale, my fav is the Phrygian again because of Pink Floyd, also the blues mode and you really have enough scales to build upon.
Oh weights do some weight training to strengthen your wrists and forearms, I use a 4.5kg dumb bell to do about 80 reps on each arm every couple of days and finally use a acoustic steel string. It builds up strength again and helps you get use to resistance, then when you go to an electric you will find your pace is even faster. Also use about .11 gauge strings on the acoustic.
Ben