[gonehome]

Just do it now - an adult can ramp up quickly with focused practice too. Though you’ll still have nobody forcing you to do it. You can probably reach a pretty good ability level in a year or two of taking lessons and practice.

Band instruments will be harder, but piano, guitar, or ukulele are all doable.

[jaggederest]

More importantly, the piano is the instrument of choice for understanding and participating in music theory, which means that with some fundamental understanding and a lot of practice it unlocks many other instruments, as well.