just pick one you like more and go.

Also availability. What instrument is cheaper, easier to borrow in your region?

I agree with u/ukifrit. Pick something you actually want to play. Otherwise you won't stick with it.

any you want I guess, though from what I understand it there is an official "braille music" system for piano which may make things a lot easier. Also perfect pitch is life. Seriously. I use it more times than I can count when producing music and I should not take it for granted as much.

My blind brother in law is a drummer. I can easily play the bagpipes without looking at the chanter, but maintenance on the instrument would be a bitch.

Piano, guitar, really any instrument are playable without looking at it. It's just going to take time and practice. I'd actually argue that being forced to learn with your ear exclusively is an advantage.

If the person cannot say which instrument they like to listen too, save the money, and don't buy anything. We could say that the ukulele is an easy instrument to start with, but if the person wants to play metal, they won't want to play it.

It depends what you're into. While I've performed and taught both guitar and bass, I also play a bit of piano and have played drum set off and on for a number of years. It's got to be something that grabs you or you probably won't dedicate enough time to it or enjoy it that much.

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Pick what really gets you going and you can figure the rest out one way or another. (You can also post more specific questions here once you've narrowed your instrument choices down a bit.)