Watch the JAM: Combining Shapes online guitar lesson by TrueFire from The Indispensable Toolbox for Guitarists
JAM: Combining Shapes - Playalong is a video guitar lesson presented by Susan Mazer and is sourced from Hands On Guitar: Beyond Beginner.
This is a great tune, and you'll hear that it moves quickly. It also has quite a few changes. If your hand gets tired, stop. You're using all new muscles when you play barre chords, and you don't want to over-work your hand.