Ok I take it back.. (a bit) How the hell do you buy songs? I mean this is supposed to be the point right? So I found an artist I like, shouldn't there be a r

Ok I take it back.. (a bit) How the hell do you buy songs? I mean this is supposed to be the point right? So I found an artist I like, shouldn't there be a really obvious way to buy the album/track? (or telling me it isn't available for purchase yet?) That kind of makes my head explode.. I want to support the artist but it isn't letting me.. arr!