Pretty much any of the songs used in the 4 Chord Song by Axis of Awesome, but other than that, a lot of pop/punk is pretty easy to play. I'd recommend finding a song you like that pretty much recycles the same chord progression over and over, because if you're not playing music you enjoy, you slowly learn to hate the instrument (trust me on this one). It's pretty much how everyone who's self taught does it, you just find a song you like, open a chord generator so you know which strings and which frets you should be playing, and then try and replicate it, slowly progressing onto more difficult songs. Good luck.