2 things that need to be studied to be a good guitar player

1. Motor learning (relate to muscles) 

Playing electric guitar is essentially moving the right hand to pick and play the left hand to press the strings on the fingerboard. To be able to move both hands properly and flexibly to exercise the finger gymnastics. 

2. Musical lessons 

That could be an insight, theory, music listening experience and so on. To master this second lesson should have a coordinated movement of the fingers of his left and right as well.