This is what you need to 'learn' the guitar.
A few simple lessons on posture, hand position, and simple chord progression. After that, fire the teacher, and get some tablature.
Tablature is like sheet music, but it tells you exactly where to put your fingers.
I took about a month of lessons (4 total) back in 1992, and ive been playing since. Other than those simple lessons on (see above), im completely self taught. Thats all you need. Then once you learn a few chords, start or join a band.
Practice with that band all the time, and when youre not with them, practice more.