Since you are both positioning this for true beginners AND surfacing YouTube videos which offer varying degrees of teaching skill, level of spirituality, focus

Since you are both positioning this for true beginners AND surfacing YouTube videos which offer varying degrees of teaching skill, level of spirituality, focus on anatomy, etc. I recommend adding a prominent disclaimer about variability of classes, encouraging shopping around. I'd hate for people to try a class that wasn't a fit, and judge the whole practice of yoga. I think a great onboarding would suggest 3 very different classes.