[otterpro]

I've taken lessons when I was in kindergarten and when I was in High school, but it has never been an easy instrument to learn. I'd say piano/keyboard easier than violin, but much much harder than a guitar. The 10,000 hours might not be enough to master piano, if you're starting as an adult beginner. However, you can definitely learn to play chords and simple melodies on piano. One thing to note, if you are a developer/programmer, be careful as piano has the same risk of getting carpel tunnel syndrome, so consider the ergonomics, and also don't overplay on piano. PS: I wish there was an ergonomic piano.