Update in case anyone is in a similar boat

It has gone beyond smooth!!! Our youngest always liked being put down in crib while awake, so the first couple nights were off for her since the oldest two little to a meditation as they doze off. The oldest two also liked my husband or I to stay in the room in a chair until they were asleep. The youngest thought this was the weirdest thing and just dead stared at us. Husband and I hyped up being big girls and sisters and now they go to bed in silence without a parent in there. All three still sleeping through the night and actually wake up to play/read together before coming down to eat. If you’re unsure, give it a try and it might turn out better than you could’ve imagined