Reading music in itself might seem daunting, but it's not all that difficult, but becoming fluent takes a little time and ...
For buying music, Bandcamp and Discogs both came up a bunch. A few of you also like using Discogs’ collection-tracking stuff, which looks pretty cool.
There are different ways of reading and writing music. In music notation, the notes tell the musician exactly how to play something. A graphic score is made up of lots of different images.