Hi there. Thanks! I’m glad you’re enjoying it!
It’s best to think about it in the context of overall principles. I really like the recommendations from Osteoporosis Canada on Safe Movement. Go through the short list on the page and you’ll see that you mainly want to avoid stress on the spine. Gentle weight-bearing is good, which is what yoga is great for, but you specifically want to avoid stress on the spine in a bend or twisted position.