I took a long time to get into the swing of WFH, now I wouldn't want to go into the more than a day a week.
I try to keep the mornings for getting tasks done and afternoons for meetings when possible.
I have a to do list at the top of my calendar, things that I particularly want to complete that day, might be writing a report or just responding to a more involved email, anything really that's important for that day.
I take regular breaks, we're not monitored, as long as the work is getting done it's very flexible, so if I don't have lots of meetings I'll often start early, sometimes 7:30, focus for maybe an hour and a half, then take a break to make a drink and have breakfast and then go back and have another focused couple of hours before breaking for lunch. I'll have another break mid afternoon and might go for a short walk or potter in the garden for a few minutes to get some air. I find breaking up the day into sections helpful.
I do quick jobs around the house, like popping a load in the washer while I'm waiting for the kettle to boil. I have the odd meeting where I'm just listening and can have my camera off, I will sometimes get a head start on dinner, but only jobs that don't need any concentration like chopping vegetables.
I'm very productive and work quickly and I'm more productive now than in the office with all the distractions and interruptions.
It sounds like you've got the balance wrong OP.