Aloha Nacho,
"Rocking the Baby" is a very effective and commonly taught technique for working into the full lotus -thank you for mentioning it Ananda
Whichever of these exercises you choose to spend time with, warm-up with those mentioned by Chunyi. They slowly and simply relax, lubricate and open up the ankles, knees and hips.
The sitting squat works to help open your lower back. Be gentle and respectful with your knees during it. -You'll want to be aware of where your body isn't open enough to be in the full lotus. Whichever area it is, choose the stretch that works with it. For example, if it's in the hips and knee's, pass on the sitting squat and go with the "Rocking" or another exercise.
Be sure to start first by warming up with Chunyi's.
Much Love, Shawn
