Not every useful move needs a costume, a tracker, or a personal best. A walk can be a complete sentence in a day that already asked enough of you.
Walking helps mood, digestion, and the feeling of having done something real. It is not the only form of movement. It is an underrated one.
If you are clearing medical questions about exercise, ask a clinician. If you are looking for a starting place that does not require theater, a walk is allowed to be enough for today.