I tell you what, though: you can also not know enough. When I got – deliberately, delightedly – pregnant at 26, the largest thing I had cared for was a rabbit (who was mean enough to take care of itself). I knew – and I can’t stress this enough – nothing about birth, babies, child development, the economic consequences or emotional demands of motherhood. I dived in with only the prehistoric internet on a clunky desktop computer to guide me.