How to handle your sleep with a newborn and toddler

Hey ladies. Just wondering what all is happening in your household with juggling a newborn and toddler. My husband is home with us atm, but I am a SAHM and he will be going back to work soon. Baby girl is 3 weeks old. My toddler is 3.5. Right now (not surprisingly) I don’t get much sleep in the middle of the night but my husband gets up with my toddler in the am and I feed my newborn and have my husband watch her while I sleep a bit more until she wants to eat again. So when my husband goes back to work I guess I’m not sure what we will do, I’m just hoping enough caffeine will help me get through the day I guess but me with little sleep isn’t good for my patience. So what do you ladies do to juggle both siblings and *maybe* get enough sleep to function? Thx ladies!!