The first month is where people decide they’re "not musical"
Most people do not quit music because they lack talent. They quit because the beginning feels awful and badly designed.
I know, because I have done it myself. At one point, I learnt a few chords on acoustic guitar, got just far enough to feel like I had technically started, and then gave up. Not because I made some grand decision that guitar was not for me. I just stopped picking it up. The guitar stayed where it was. The habit never became a habit.
And I think that is how it happens for a lot of people.
Think about how many guitars are gathering dust in spare rooms right now, or how many keyboards were set up once and have mostly served as a shelf since. How many people downloaded a guitar or piano app, watched a video, had a go for twenty minutes, and then quietly never opened it again?