Try your local library, if the have music.... try listening to different styles..... find what you like.
Computer midi files are good if you have a program to display the notes (a sequencer software program) . you could the learn how to play the songs you like.
Look for online lessons.... there are a lot of them, they have samples of playing to learn from.
Go to ebay and find a CD by Stray Dog. This is a 3 piece, guitar, bass and drums, from the '70's that will kick your ***!!! If you want great guitar licks then this is a great place to start!! I have yet to find their music on Morpheus or Napster or any of those tyes of places but they are on ebay!! Great, little known, band!!!