If you like classical music, here's a discovery I made recently: Freegal, the public library downloading service, apparently has all nine Beethoven symphonies, as recorded by conductor George Szell and the Cleveland Orchestra. There are also other Szell-Cleveland recordings. To put it mildly, you could do a lot worse to build up your classical music collection.
Freegal is offered by Sandusky Library, Port Clinton's library, Huron's library and pretty much every other local library I can think of. If you have a library card, you can download three MP3 songs a week. They are not songs you borrow; you can keep them. They are DRM-free, so you can transfer them to your music player, smartphone, etc.
The service draws music from the large Sony Music library. If you don't like Beethoven, you can build up your Adele collection, your Miles Davis collection, your Pearl Jam collection or whatever you actually like.
Sandusky Library, by the way, is about to add Hoopla, a service that streams music, audiobooks, movies and TV shows. More about that soon.