There is no single week on the calendar when everyone can drive again. It depends on which leg was operated, whether you drive a manual or automatic car, how quickly you can perform an emergency stop, and whether you still take pain medication that affects reaction time. Insurers also have their own rules.
Ask your surgical team before you drive again, and check your insurance conditions.
For daily life, the same pacing idea applies: shopping, cooking and light chores are good practice - in portions, with rests, rather than everything in one morning.