GT has been a big help for me. I started with Lisa's fundamentals and though I already knew some basics, the structured approach was very helpful. Also of note, I have a damage/disabled fretting hand index finger and it is a problem for me as it doesn't have much range of motion nor does it straighten perfectly. I reached out to Lisa and she messaged me back with suggestions and encouragement that has stuck with me.
Good luck Gina1
~Jason