dietary respect
Eat more. After all, I am still a student and still developing.
Eat more vegetarian food and less meat (if you want to lose fat)
Eat more fruits. Eating fruit can help repair muscles, that is, after you finish weight-bearing exercise. Eating fruit is good for all aspects of your health, especially apples and bananas.
Drink more water, this is not much to explain.
Eat more protein, because you want to gain muscle, such as eggs (don't eat yolk).
sports
Running, running is aerobic exercise. Run time if you want to lose weight, and run speed if you want to practice explosive power.
Push-ups, sit-ups and squats (the most basic movements of fitness)
Because you are a student, don't practice too hard at ordinary times. Doing more exercise is good for your development! And go to bed early! Sleeping late will consume muscles ~