Although probably not worth the ROI today, when I was young my Mom was a concert pianist and a Jazz pianist. I learned playing scales up and down the fretboard. I learned intervals which led to some unique comping and basic chords which for the most part once you know the fretboard you can create any chord you want anyplace on it. As far as lead playing goes... The Clarinet is written in the same register as the Guitar so grab some clarinet books and learn to read and play what is written. I loved some of Bach's music because it really made you work. It also means that when you start cranking up the volume you will sound like yourself and not a copy of anyone else (but now have the skill set to do that if asked)