It’s a mental adjustment. It’s a schedule or routine you and your partner may need to build. All depends on how you keep your domicile concerning the errands aspect.

I’d carve out your productive time or when the creative juices flow and try to get that moment for you setup for the day you’d get. Then have your mindmap, notebook or whatever easily accessible to just note or draw your thoughts on the problems or concepts.

Maybe you can look into alternative sleep cycles (Edison, Tesla, Bell etc) and see if that allows for a you time.

I’ve found looking for news aggregated sites related to your niche can also just give you a little pick me up boost to stay in the know on trends but also gives you content for say a Pocket or repo to gather content to read before bed or another time. Heck even reading it to your young one.

I’ve been combatting this for several years. Once the independence kicks in for them you are freed of things you thought you would never be. Also really neat when they are interested and or can do work while mom or dad works.

About payment problems. If the employer looks to 4 day work weeks it’s either going to be 4-8’s or 4-10’s and if 8’s to stay competitive will need to accommodate for 5-8’s pay schedule. Then there is the pay off of carving out your time to maybe push a side project or contribute for a slice of revenue that could be your play money.

It may complicate the money situation, but as a new parent my wife and I have found a lot of value in paying the extra price for stuff like grocery delivery. We also found value in getting a roomba.

The roomba keeps the main floor of our house clean enough that we can afford to go a few weeks without using a real vacuum if we need to.

The grocery delivery saves us on having to get the kid together, ensure the diaper bag's packed, drive out to the store, find the stuff, drive back home. Or at least we can avoid locking down one of us with kid duty while the other runs out to shop. It's not cheap, between fees and a tip we often end up paying ~20% more, but it's a time vs money value decision. I find we're valuing our time more than money a lot lately. It also allows us to re-up groceries or household goods on days one of us is working from home, while we're working.

Granted, I'm in a very stable salaried position where I'm not constantly being picked apart on metrics or qualified productivity (I'm more sysadmin and automation than software dev). We're also in the early stages of child rearing, not even 6 months in yet. Mileage may vary.