Enter the password: inhale
Do the intro class first - you can do the first parts in bed, if you're co-sleeping, which is helpful. Learn a little about anatomy, and then get in to the breathing. I found most of my first positions in bed nursing Ziggy in the my first few weeks post partum. Once you get the hang of it, start experimenting. It's a great way to use the enforced stillness.
When you're ready to start moving, try out the back and hips warmup, It's Bed! and the strengthening sequence.
Do any of the shoulder and wrist sequences as soon as start sitting up and holding your baby. The enforced forward bending while holding a tiny human is going to start asking weird alignments of your upper body immediately. Do what you can to counteract this as soon as you've got the inclination to move.