Hello everyone! Mommies, how do I get back to breastfeeding after a bo…

Hello everyone! Mommies, how do I get back to breastfeeding after a bottle? ?‍? The baby was in a pathology for 5 days and they were initially feeding him through a syringe. Then I would express milk and give him from a bottle. Today I tried to give him breast milk, but he doesn't want it at all. Maybe it's also that my nipple isn't developed yet ? maybe he can't latch on. In general, trouble. How do I deal with this?