Music and guitar performance is an academic subject like any other, and has a standard curriculum. There are a few well known top schools, Berklee, MI etc. There are a couple of standard method books.

There really is no need to try to discover "how to get good at guitar" any more than you need to discover how to get good at mathematics.

Music is a language, you practice reading, writing, listening and playing (speaking).

How to get the time for the study, is the challenge, of which there's no "secret solution". Only people who are relatively well off can afford these schools, and/or take the risk of studying something so frivolous with such a low chance of paying off.

If you practice something diligently for 30min every day, it will still take you something like 25 years to rack up the hours of a 4 year masters degree.