Watch the D sus 2 Tuning online guitar lesson by TrueFire from Play Acoustic Guitar 9: Advanced Style Diversity
D sus 2 Tuning - Performance is a video guitar lesson presented by Vicki Genfan and is sourced from Essentials: Open Tunings.
If you feel more comfortable using a pick, feel free to use it. In the finger picking or plucking section it will be good practice for your flatpicking technique. Take note of how I use my left hand thumb to help mute the 6th string while I'm playing the chords that have the 5th string as the bass.