While I was at my parents' house, we arranged it so I could stay on one floor only. I slept in a room on the main floor that used to be my grandmother's bedroom, rather than in my old room upstairs. So if you could arrange to spend most of your time at home in a limited area, that would be help. Once some time has passed after the surgery and you're feeling stronger, you can expand into other parts of the house.

As for clothing, wear what you have to at work. They should understand if you need to ignore the dress code for a while. I've seen several co-workers at various jobs wearing more casual clothes than normal due to a temporary health situation. It's better for them to have you there in shorts or sweatpants than for you to be unable to work at all.

BTW, your brain will need time to recover from the anesthesia. I remember months after surgery I looked over some spreadsheets I had worked on at my parents' house, and I found a bunch of stupid errors. At the time I worked on them, I thought I was fine, but in retrospect I was not firing on all cylinders.

For housework, could you hire a cleaning service to help out for a few months? Or maybe find a teenager from the neighborhood to help a few hours a week with things like laundry and vacuuming?