Need all the breastfeeding tips I can get

EJ
2 days postpartum.. Milk hasn't come in yet and not certain baby is getting colostrum ... He's having poop diapers and some wet ones... I'm still in the hospital post c-section and I've had 2 crying spells already... I would greatly appreciate ANY AND ALL TIPS.. He latched good for the most part but it seems like he's uncomfortable or annoyed ... And just cries .. Thanks in advance ladies ...