As others have stated: you don’t necessarily need to read music for it to be fun. And there are different ways of notation. Chords, for example, are a great way to learn music without having to read on a per note basis.

Acoustic guitar is fairly easy to pick up. It will take a few days of pain to get your fingers accustomed to pressing the strings though. Takes quite some pressure from your fingers. But after those first few days, you’re golden. It’s also easier to change in which “key” you play a song(oversimplified: how high or low the whole song is).

Piano is another pretty easy instrument to learn chords on. The upside of piano is that you won’t have pain in the fingers for your first few days. You press and you’ll have a sound. It is harder to play in different “keys” though.

Keyboard is an interesting one too: You’ll learn chords like with the piano, but you’ll have acces to more sounds, backing tracks etc in your keyboard if you’d go that route.

Flutes and such are quite easy to get into, but can be a bit less interesting if you only play on your own.

But in the end, most instruments takes practice and time. Just set your own goals on what you find important.