Can someone help me with our schedule?

Me

My son is a month old. My husband works and I’m on maternity leave. His alarm is at 7 am. He would rather have several hours of sleep before waking for work. After work, he takes the baby and puts him to sleep.

My question is, what shifts would you suggest for the two of us to feed and take care of him? We take turns bottle feeding.

We tried my husband taking 7 pm-12. I take 1 am feeding, he takes 3 am and I take anything after that. Problem is, baby doesn’t always wake at 1 or 3 am. If he wakes at 2, then 4, I’m pretty much feeding him back to back with no sleep 😫.

Any ideas???