I remember caring for the belly button/umbilical cord with cleaning at each diaper change with water or with alcohol, and don't give the baby a full bath until it comes off. That is completely different then circumcision because there are no nerves in the umbilical cord so there is no pain there, where with circumcision it can be painful.
One other thing I disliked about caring for an infant was clipping nails. We have a small clipper but this task always makes me nervous and with our daughter I think I made my husband do it. He is very good with attention to detail and taking his time on things.