> I started daily shopping with a backpack to carry what I buy.

I do the same, slightly shorter distance. There's even an exercise that people put rocks into their backpacks and walk around, they call it rucking I think. I could never do that, but bringing the groceries, sure!

Time spent in the car is wasted, time spent walking for groceries is well spent.

Moving back to my hometown of 400k people, I found I don't even need a bike: I can get almost anywhere in an hour's walk!