If exercising after a meal, wait at least one hour. For safety, generally start exercising one and a half hours after dinner. After exercising for about an hour, take a shower. I think your half-hour run is a bit short; I recommend adding 10-15 minutes. This extra time can more effectively burn fat.
For evening running workouts, aim for at least three sessions per week, each lasting 30–60 minutes. Maintain an intensity where your pulse stays below 120 beats per minute after five minutes of running and under 100 beats per minute after ten minutes. If your heart rate becomes too high, reduce the exercise volume. If you can comfortably carry on a conversation while exercising, your intensity is appropriate.
Beginners should start with 20-minute daily walks, increasing to 25 minutes in week two, 30 minutes in week three, adding light jogging in week four, alternating walking and jogging in week five, and gradually transitioning to sustained running.