Could you learn the acoustic guitar by yourself?

yea its fairly easy to teach yourself just practice scales and chords and intervals and also you can look up many good tutorials to new chords and progressions

Playing guitar is fundamentally about teaching your fingers to do weird things they aren’t used to doing. That’s it. It doesn’t take a genius. It takes some hours. Learn here https://tr.im/MmQfO

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Yes. My brother did and was excellent.

if you work hard and it and just practice lots you can do it