Do not try to be quiet around the baby. People who have signs on their doorbells saying “please don’t ring, the baby is trying to sleep” make us shake our heads. They are clearly new parents who haven’t learned that the last thing you want to do is to train your children to only be able to stay asleep when it is absolutely quiet.
Prioritize your relationship with your wife or SO. The kids will move out eventually, but your wife will (hopefully) still be there. I know people who refuse to ever get away as a couple because one of them don’t want to leave the kids. Leave the kids with someone you trust and get away on a regular basis.