Are you too old to learn to play?
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You’re definitely never too old to learn to play. You can learn anything you want whenever you want. It may not be what a specific age group may be looking for but that’s a different issue. Learning is lifelong!
As for the overwhelming info you’ll find online; just pick and choose what you want because that will make you YOU.
Even though you don’t understand everything people are saying, it’s important to simply be exposed to the discussions themselves and eventually things will fall into place or may trigger a question or even an answer.
A basic understanding of music theory/guitar basics goes a long way of course so definitely keep digging or go for structured lessons but don’t worry too too much.
Let your curiosity lead the way! 😉👍