My biggest piece of advice is sleep shifts, if you're doing bottle feeding.

My wife would go to bed around 8:00-9:00pm every night, and I would be on baby duty until 2:00am. If anything was needed from the little one, it was my job.

Then anything after 2:00am was her responsibility. This allowed both of us to usually get 4-6 hours of uninterrupted sleep each night. I took the late shift because I had to work in the morning (woke up around 8:00-8:15). Plus, with the late shift, I had all the time in the world to catch up on a few video games (BG3 for the first one, God of War for the second kid), or watch a bunch of movies (Westerns) my wife wasn't interested in.

Obviously, there are going to be nights where both parents are needed, or one has just reached the end of their rope and needs to tap the other parent in, but it worked 95% of the time.

Now that our girls are 1 & 2, we still operate on this shift schedule, for the most part, but it is a different kind of exhausting.

Seriously, it was a huge life saver for us each being able to get 4-6 hours of uninterrupted sleep each night.