A large part of learning to play guitar is learning about how YOU LIKE to go about learning. Memorizing the boxes and their relative positions doesn’t necessarily work for everyone. It never worked for me. I would suggest that you take a different track than you are on currently.
I suggest:
- Learn to play music by exploring the fret board and by playing musical stuff.
- Put on a Gmin drone backing track or Gmin chord drone or groove in a looper.
- Work on traversing the fret board linking the pentatonic boxes in a musical way. In relality you really only need to learn pattern #1 and then learn how to link in the other workable patterns. Consider taking a ride on the pentatonic highway (follow the links):
3 notes per string major scale - #3 by CT