I picked guitar back up as an adult after not touching one for over twenty years, and I wasn't alone in it, my daughter was learning at the exact same time, sitting right next to me most days. That timing matters, because it meant I couldn't quietly quit the way adults usually do when something gets hard. But even setting that aside, what actually happens when you pick up an instrument as an adult is different enough from being a kid learning that almost nobody prepares you for it.
Here's what actually happens, not the version that makes it sound easier than it is.
Your hands remember nothing and your ego remembers everything
Kids don't really have an ego about being bad at something new, they just are bad at it and keep going. Adults do not have that luxury. You've spent years being competent at things, running a household, doing a job, whatever it is, and then you sit down with an instrument and your fingers won't do what your brain is telling them to do, and it's genuinely uncomfortable in a way it wasn't when you were seven.
That discomfort is the first real hurdle, and it's not really about the instrument at all. It's about being bad at something in front of yourself, maybe in front of your own kid, and having to be okay with that for longer than feels reasonable.
Progress is slower, but it sticks differently
I'm not going to pretend adults pick things up as fast as kids do in certain ways, especially anything involving raw finger dexterity, that stuff does come easier when you're younger. But adults bring something kids mostly don't have yet, actual patience with a process, and the ability to understand why a technique works instead of just being told to do it.
When I finally got a barre chord to ring out clean after weeks of buzzing, muted strings, I understood exactly why it had been going wrong, hand angle, thumb position, pressure distribution, all of it. My daughter just kept playing until her hand figured it out on its own. Different paths, same result eventually, but the adult path involves a lot more frustrated intellectualizing along the way.
The time problem is real and nobody talks about it enough
This is probably the actual biggest difference, more than any of the mental stuff. A kid's practice time gets built into their day by somebody else, a parent, a school schedule, whatever. An adult has to carve fifteen minutes out of a day that's already full, and there's no one making sure it happens.
Most adults who quit an instrument don't quit because they weren't good at it. They quit because they never found a consistent slot for it and it slowly stopped happening, then felt too far gone to pick back up. If you're starting as an adult, the actual skill isn't finger placement, it's defending fifteen minutes from everything else trying to take that time instead.
It's genuinely worth it, just not for the reason you'd expect
I thought I was doing this mainly to keep my daughter company. Turns out I was also doing it for myself, and I didn't clock that until a couple years in. There's something about being bad at something new as an adult, and sticking with it anyway, that changes how you approach other things you're bad at too. It's a strange side effect nobody mentions when they talk about "learning an instrument later in life."
If you're an adult thinking about picking something up, whether it's your first time or your second time after a long gap, the honest advice is this: expect it to feel embarrassing for longer than you'd like, expect your hands to lag behind your understanding, and expect the actual obstacle to be time, not talent. None of that means don't do it. It just means the difficulty is a different shape than you're picturing.
If you're an adult figuring out where to even start, gear-wise, that's a conversation we genuinely enjoy having. No judgment for starting later, plenty of us in this family started later than we'd like to admit.