Whenever I have more time then I will do more exercise like push ups, punching bag like boxers for only upper body exercise. You could invest in a treadmill to run in 5 minutes to 10 minutes inside your house but remembering to open your windows to get clean oxygen coming in your room!!!
If you prefer a more cardio intensive workout, just do a 15 min HIIT session. You can try Downdog HIIT or YouTube channels like Joe Wicks the body coach.
If not get a rope, 10m skip will do that
Try to do that ❤️