First of all, daily exercise is essential. I read your question under other people's answers. The weight base is relatively large, and the first step you have to do is to reduce fat.
Now many students have mobile phones, and I believe you are one of them. Then, download a fitness software, anything, and then find a fitness plan that suits your situation, exercise every day and punch in every day.
Secondly, we must control our diet. It makes sense to practice three points and eat seven points. In order to get a better figure, you must control every bite of food you eat. Eat less oil and salt, eat more vegetables, don't eat too much meat, and try not to touch snacks, especially things with high calorie and fat content such as chocolate, cakes and puffed food.
Generally speaking, it is like this. If you want to lose weight, you must stick to it every day. It's no use thinking about it!