Watch the D sus 2 Tuning online guitar lesson by TrueFire from Play Acoustic Guitar 9: Advanced Style Diversity
D sus 2 Tuning - Breakdown is a video guitar lesson presented by Vicki Genfan and is sourced from Essentials: Open Tunings.
Make sure to move your left hand fingers as little as possible when changing chords - notice which fingers can remain on the strings as you move from one chord to the next. While my strumming pattern involves down-up strokes, you may find it easier to strum with only down strokes. That's fine too, as long as you're playing the correct rhythmic pattern.