@ShouldIStaySelfIsolated you have the lovely picture in your head, and that is lovely.
The reality is that most children learn the piano for 2-3 years before giving up because they hit teenage years, or an age where homework increases and/or they don’t want to spend the increasing practice time it takes to improve. Children might start needing 10 mins/day in the lower levels, but it usually increases by 10 mins each year, and by grade level it can be hard to find 30-40 mins every night (not some nights, every night). You can’t just do three hours on Sunday and call it a week - practice really must be spread out properly.
But that’s fine - 3-4 years for kids is lovely and they move on to something new, but can always read music and return to it.
Reality as an adult learner is that (if you
can’t read music and are a true beginner), learning piano (like learning a language) will be hard and you will need to practice a lot in order to improve. The first bit will be ok - your excitement will motivate you and the quick wins of being able to play your first pieces, but the monotony of practice and work, as well as the fact it is hard to learn things as an adult will make it hard after awhile. You have to really want to do it to make it last. Piano practice can be like going for a run or to the gym - you know you should but you just want to do anything else but that. And if you don’t, lessons become hell, you stop and then you don’t get anywhere.
But that’s the worst. And is it so bad? You have a piano you can play abit, and kids who can too. And if you learn enough you can always re-teach yourself the Christmas carols each year.
Disclaimer - I love piano and have one. I learnt as a child and an adult. I have a teacher and am quite advanced in the grades etc, because I put in the work now, but I spent years just messing around and not getting any better, because you need to practice to get better, and I had too much of a life to do that. I was going to quit prior to lockdown (just needed a break), but didn’t and it was great during that time.