Can you self-publish your music onto iTunes et al?

The title pretty much sums it up... But I'll elaborate.

At some point, I want to record my own album. Me on all the instruments. Okay, so that's a long way off (I don't even own a bass guitar yet!) but I was wondering...

Considering I can't play gigs (I don't have that many arms) then maybe I could release my songs/album onto iTunes or somesuch equivalent.

Can this be done? Is it just like self-publishing a novel on Amazon, only for music?

I was just curious at this point.

Thanks in advance.

Nice. Gotta love Lord Of The Rings references.

SoundCloud... What's that, anyway?

<-- total newb.

Well, hopefully someone will come along and tell us if we can self-publish our music for money.