It is almost impossible to remove fat from only one body part. When you lose weight, you lose fat and volume in all parts of your body. Of course, you can do abs, but your muscles will hide under a fat layer. You should first consult a nutritionist and develop a healthy diet that allows you to lose weight gradually. A healthy diet is the key to good results. Of course, you should not neglect training and physical activity. I advise you to buy a bathroom scale to track the dynamics of your weight and body condition in general.