There is no exercise that can help you reduce only your belly fat. And, you are never, ever supposed to eat less and deprive your body of essential nutrients. The best piece of advice here is that you eat healthy, cut back on white sugar intake, and dedicate at least 1 hour to yoga or jogging! That much is enough to stay fit in the least possible way!
And, if your body type is such that you accumulate belly fat very easily, let it be that way! Who cares! And, if it really matters and thus you can afford to hire a dietitian, go and talk to a certified one. They will work out your body and diet as per your unique needs, and in due time, you will be as slim, trim, and in shape as you might have ever desired! That is all I can say in this regard. Without spending some money, you cannot be in the shape of your preference.