I must amend.
The math in terms of work is staggering.
21 X 12 in just one position.
21 X 12 + 5 or 7 and or variations.
Melding into pentatonics 5 X 2 + 21 X 12 + 5... (it's actually greater or a bigger equation)

I'd hate to do this on paper. I discovered the other method, by doing it on paper. (before the first Apple)

Memorizing interval shapes, 5 basic chord forms,5 pentatonic shapes used two ways, 7 major scale shapes altered two more ways, my previous modes rule, covers just about every theoretical and mechanical item in todays music on guitar in a nutshell. I am not covering technique,
timing, etc., just very basic to extremely advanced music notes for guitar simply put. This information can be put to use, immediately. When in doubt, one can always just simply look at the guitar fretboard and find the correct answer.
The guitar looks the same, all over the instrument.
Be able to say out loud: A B C D E F G frontwards and backwards from any point, faster than your name. (hope it's not Ed or Ty) BC and EF (natural half step rule) are ALWAYS next to each other.
All other letters have a space or fret between them. The spaces are named going up in sound # sharp, going down b flat.
Standard chord progresstions, stated earlier, pretty much covers everything else. This is the system. Any person can take it in any direction wanted. From basic to advanced. It covers most if not all forms of music and guitar of today.