first time moms/ first time having kids

Jessica
How many moms knew exactly what they were doing when their first child was born? If you were a first time mom that didn't have nieces/ nephews or younger siblings. Just wondering bc I'm tired of being told by my baby dad that I don't know how to take care of my son ( who has 2 nephews I never had any) (we had our first kid 3 months ago)