Newborn and two year old sleep

Alejandra • Male infertility had one egg retrieval, 1st FET was 2016 successful baby girl and second FET 2018 and currently pregnant with baby Boy! God is Good

My toddler will be 2 years old when I give birth and people tell me to sleep when newborn sleeps but what if I have a very active 2 year old? How am I supposed to get sleep also if newborn is sleeping should I keep him in a room where 2 year old can’t wake him up or get him used to sleep with the noise? Is there any schedule or tricks to make this go smoothly?

Also I plan to exclusively breastfeed. Help 😬