In autumn I started a small routine. Walk first, coffee second, and no phone until both are finished. It sounds trivial, and it is, which is why it actually lasted more than a week.
The walk is not long, and it is not exercise in any serious sense. It is just time outside before the day fills up with screens. The coffee afterwards tastes better for it, which is a small reward that keeps the habit going.
I do not track the walks or count the steps. Some habits survive precisely because they are not measured.