There is a lot of, mostly unreliable, third-party documentation, but Caring for Your Baby and Young Child, Birth to Age 5 for the American Academy of Pediatrics has seemed to be a pretty good value.

https://shop.aap.org/caring-for-your-baby-and-young-child-pa...

Beyond that:

You and your co-parent need to watch out for your own and each other’s physical and mental health. It’s easy to lose track of.

Talk to your baby, as much as possible.

Everything will change when you least expect it. Be flexible.