Baby due in 3 weeks. Help a FTM feel confident breastfeeding!

My biggest concern is breastfeeding after the baby is born. I worry about my milk not coming in, jaundice, and not being able to feed my baby.

Can anyone share what their first few weeks/month was like breastfeeding their newborn?

I’ve read books, but nothing is going to come against experiences. I just want to know what to expect and not feel like I am a helpless mother who just wants to feed her baby. Although, maybe every FTM feels that at some point during the struggle of learning how to feed baby.