How do I know if my baby is getting enough?

I had my daughter yesterday and my goal is to breastfeed

Obviously my milk hasn’t come in yet but how do I know if she’s getting enough colostrum?

I don’t think the latch is right but she seems really happy on the boob.

She’s done 2 poops today but haven’t noticed wet.

She falls asleep on the boob but I don’t know if that’s from her being full or tired