Getting newborn on a “sleep schedule” - well, really just to sleep at night

Nabi • Mom of 2: girl born in 2015 and boy in 2019

My son is 2 weeks old now. When he was born, just about any baby, he had day and night mixed up and wouldn’t let us sleep until at least 4 a.m. or so. But then it slowly got better, by at least half an hour or so every night. He started to sleep 3-4 hours at a time so I finally started to get some sleep again and I thought we were on the right track. Except now it’s getting worse again. Last night he pretty much spent the entire night clusterfeeding. I finally fell asleep around 5, only to be woken up at 6:30 a.m. by my older daughter. I’m exhausted.

Does anyone have any tips how to gently guide him to develop a sleep-wake schedule that is a little more family-compatible? I don’t remember this being so hard with my first, or at least don’t remember her going back to not sleeping once she had already improved. What I do do is to pay attention to light, so that he has it somewhat dark at night and light during the day, thinking that should affect his body. Intuition also tells me it would be good to keep him awake more during the day, but I was told that would likely backfire and result in a really cranky baby. Is there anything anyone else has done?