Listlad, I work from home too, but I made a deal with myself.
I do somehting every day - even if it's only a walkl aeround the village. I don't use the carr to run errands inthe village unless it involves a lot of carrying, or it's absolutely throwing it down.
Going to the supermarket, I park well away from the entry/exit. That gives me a few extra steps, ut it alse means fewer door or trolley dings. When I go to town, I always park on the outskirts and drive in (same conditions as village errands), and I always walk to the bottom of the main street (it's a small, no-horse town), and back up the hill again, either before or afterr I do my errands.
Finally, I have a static trainer for my bike, a bit like this,
https://www.lidl.co.uk/en/MiddleofLidl.htm?articleId=19893 . I usually have it in my garden, and it means I can do a bike ride without going anywhere. If I have to persuade myself, I download something from iPlayer, or stream something, and watch it with my iPad propped up somewhere. It's amazing how easy peddling for an hour, whilst watching something good is.
Exercise doesn't have to involve lycra or perspiration.