Girls, please tell me, I'm going to the maternity hospital to sign up …

Girls, please tell me, I'm going to the maternity hospital to sign up for a card and immediately start packing my bag for the hospital. I wanted to buy a ready-made one, but those who have already given birth say that half of it is not even used. Please tell me what's really worth buying, preferably a list because the list in our maternity hospital is very narrow. And is it worth taking adult diapers instead of pads?