Eat three or even four meals a day, pay attention to balanced nutrition, and don't eat high-calorie things. Because fat people generally have a small basal metabolism, a little heat will soon gain weight. Don't go on a diet, it will hurt your health and make you fatter.
If you have no experience, you can finally find a gym and find a fitness instructor to practice.
This method is tough, because it is difficult to persist and the process is very tiring, but it will not only bring you weight loss, but also a well-proportioned body and a healthy body.