Chasing Cars - Listen & Learn on Pickin' Stick / Strumstick
If you're not familiar with this song, go listen to it. It's a perfect tune to learn basic chords (even 1-Finger!), then progress up to the picking part, and experiment with different chord "flavors" and arrangements for verses and choruses.
Watch the above to see how I blended some of the styles you can use on your Strumstick.
Learn Snow Patrol on Strumstick