I feel stupid asking this but im 6 months pregnant &

as a first time mom, even being with a family with alot of small children I’ve helped take care of, i have NO idea what do buy for my baby girl. My cousin had a girl recently and she was 10p5o and couldn’t fix newborn clothing anyways so i got a bunch of new clothes from her and a few newborn diapers. I have a baby bath already, i got a swing. Besides wipes, what should i stock up on or make sure i have by the time she’s here? How many diapers and which sizes should i get more of? Should i buy formula if I plan on breastfeeding?