Hmm, I already have one of these things. It's called...a guitar. You can play real notes, learn real chords, play real songs. You don't have to pay some company to download new songs. You just learn how to play the new songs. What a marvel of the modern age!
It's like some people just can't function unless the television set is on. They always need something or someone to tell them what to do every minute of the day. If that describes you, then, sorry, the music thing just isn't gonna happen. Go back to drugging yourself with American Idol.