There are no magical exercises that can reduce fat from one part of your body. You need reduce overall body fat percentage.
To drop overall fat percentage, you have to do cardio. If you’re a beginner you can’t start with long duration cardio for endurance and once you’re comfortable with long duration cardio, you can start high intensity cardio.
While cardio is the best way to burn fat and loose weight, adding strength training to your workouts will help you tone the targeted body parts. Strength training helps you get sculpted body. Weight training improves your BMR, so you burn extra calories even when you’re idle.
Tips to reduce belly fat: