Your baby should be able to easily remove milk from your breasts. As a result, your breasts should fill up over the first weeks and not get backed up with excess milk. While engorgement can happen in the first few days, repeated episodes or plugged ducts always mean your milk is not being transferred or removed efficiently by your baby.
If everything is going well, your baby should want to nurse (on average) for 10-15 minutes on each breast (for a total of 20-30 minutes) every 2-3 hours. Over the first month, the volume of milk she needs increases day by day, but so does your milk supply. You should be able to sync up within the first couple of weeks.
When your baby is transferring milk easily, you will be able to tell by her behavior. She will be calm when nursing, nurse quickly (around 10-15 minutes per breast) and will fall asleep and stay full for 2-3 hours at a time. Feedings should average out into that pattern, which equates to 8 to 12 feedings in each 24-hour period.