Breastfeeding question!

I will be getting induced in 5 days and I'm so excited! I really want to breastfeed! I know it's okay for my boobs to have no change in them yet but It does kind of worry me that maybe I'll have a low milk supply or something. But I was just wondering.. how will I know if baby is getting anything from me when she's feeding?! I know colostrum comes first until my milk comes in but I would hate to think that baby is eating and nothing come out! So far I have not leaked any colostrum which I also know can be normal!