Here's a way to understand the fretboard.
I think you're going to be surprised. I have to keep things simple. Luckily if you know these two patters, you'll be in good shape.
As I stumble upon helpful information about how to play the guitar, I will share it with you. It may be me giving my take on some else's YouTube video or something that I discovered myself.
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I invite you to subscribe. I look forward to offering you what I hope to be relevant information that you can use.