So I've been playing rock and metal type electric guitar for a little over 2 years. I love it and took lessons off and on for a year and then learn songs and technique from books and online videos. I needed a break from lessons due to work schedule change and given that my last teacher only teaches during the week. I know my pentatonic, diatonic scales, power, open and barre chords as well as technique like palm muting and rhythm stuff. I have not learned arpeggios or sweep picking and other advanced stuff like ear training and advanced music theory. What advice would you offer on how to vet a good teacher for this stuff to help me reach an advanced level of playing? I practice daily 1-2 hours and love it.