Hi. Been playing over 45 years, know basic first position and barre chords, pretty good at arpeggio and strumming, but never progressed beyond intermediate level. Grew up loving Roy Clark, I absolutely admire Jimmy Page and Stevie Ray Vaughan, and my jaw drops with Al Di Meola. I've completed the GT two-part begginner series, but now I'm struggling with where to go from there. I'd really like to become proficient at soloing with a basic understanding of music theory. Can you give me some advice? Thank you.