Depends. They usually start off with 30ml. For me I’ll increase 10ml gradually if I see the timing between each feeding is nearer as the days pass. If you’re latching, I’ll wait until baby stops by himself/herself. Between 10-15mins one side. And then the next feeding will be the other side. You should download baby tracker app to take note of the feedings and diaper changes so you can gauge how much your baby is drinking or if there’s too less diaper change etc.
depends on how old your newborn is. can do a quick google search.