A workout plan should not depend on having a perfect week. For reducing body fat, including around the waist, regular movement can support health and energy, but exercise cannot selectively burn fat from one area. The best starting plan is one you can return to after a missed day.
Give the week a simple shape
Try setting aside two days for basic strength work and several shorter opportunities to walk, cycle, or do another activity you enjoy. A strength session might include chair squats, wall or counter push-ups, hip hinges, and a light carry, with easier variations if needed. Begin at a level that feels manageable rather than treating this example as a test.
Count everyday movement
A brisk walk after lunch, taking the stairs when practical, or getting off the bus one stop earlier can add movement without requiring another full workout. Attach a short walk to an existing routine, such as the end of a workday, if that makes it easier to remember. A few useful minutes still count.
Adjust before you quit
When your schedule tightens, shorten the session or swap in a walk instead of deciding the whole week is lost. Leave room for rest, and increase duration or difficulty gradually as the routine becomes comfortable. If exercise causes concerning symptoms, or you have a health condition that affects activity, check with a healthcare professional about a suitable starting point.