If you can do full primary well you're basically already a super-hero.
The sun salutations and first 6 or so asanas are enough to get the body ready for sitting meditation.
Discussion
This is going to be a long project for me. I can't even come close to these stretches people are doing in these videos...
But that's okay. Thanks for giving me that keyword - that unlocked a lot of new information
I am not naturally flexible
It took me a full year before I was able to do the full primary sequence at all
It's best to start doing just sun salutations
Memorize Surya Namaskara A and B?
I'd suggest doing five of those each, every morning.