So question for mommas who have more than one kid and did breastfeed.How do you prepare?

With my first milk didn’t come for couple days due to complications after delivery so lots of meds and big baby.So we formula feed.I tried to pump but no much luck so we stick with formula (thanks god for it).

But now I want to try breastfeed so any tips before delivery how to prepare? And after delivery? How your meals look like,how often do you eat?