I think having babies is so unpredictable that you should use my method... called the Flying By The Seat Of Your Pants Method, it involves little preparation both pre and post-baby.
For the initial first few weeks, you and your partner need only do the very basic survival, and the rest is all decided at the moment that it is needed who will do what. For example, the person least covered in baby vomit goes out to the shops to get bread, whilst the person left behind tackles the giant pile of dishes to eat your sandwiches off of.
As you become used to the baby, you go into phase two, which I call Tag Teaming. A partner is generally back at work, so you work in sleep shifts and tag your partner once you can no longer handle any more.
Generally working parent (WP) will come home and take first shift - Bathing Baby, whist Stuck At Home Partner (SAHP) escapes to the kitchen for a cup of tea without nipple attachment for the first time all day/escaping from the explosion of shit inside grinning baby's nappy, and throws together sustenance.
Then both take baby to bed, shift two, known as Baby Settling, can be extremely frustrating, thus takes both parents to support each other through various patting, singing, feeding, begging, pleading and ninja rolls silently from rooms. Both celebrate with silent cheers coming down the stairs and flop on the sofa.
Then for each time baby stirs it is taken in turns to settle and sort out, this is the Rapid Fire round, where you both hear the wail, and frantically try to remember who was last so that you can shrug and say Your Turn!
SAHP then tends to take Early Bedtime, allowing WP time to relax and unwind from work, responding to baby and allowing SAHP to sleep and catch up. Earplugs are often necessary. There is an agreed swap over time, where SAHP becomes parent on duty, called Middle of the Night, and working parent sleeps.
Then WP wakes and is on shift whilst getting ready for work, bottles may be prepared, mess hidden in cupboards, and dishes done. This is a known flare up time where despite complete silence baby is able to psychically know one parent is awake. Generally it only stirs the moment the WP leaves the house, the moment signifying shift change to EARLY MORNING and so begins the long day shift.
At least, in my experience anyway. I did my second on my own, and FBSOYP method also worked, although there was no shift work.