Movement as an energy tool, not a performance goal
The European Commission factsheet for Estonia states the recommended minimum for adults as 30 minutes of exercise twice a week. That is a floor, and it is achievable even in a busy month.
Walking counts. So does cycling to the shop, swimming, or gardening. The point is not fitness metrics but the effect movement has on sleep depth, mood, and appetite regulation. Two sessions a week is a reasonable place to start if you currently do none, and more is better only if you keep it up.