About growing taller: It is said that drinking milk can grow taller. Japanese people grow taller when they drink milk. You can try to drink one or two bags of milk every day, preferably low-fat milk, because you want to lose weight. It is best to take advantage of winter and summer vacations, drink more milk and exercise more, so that the chances of growing taller are higher. One of my classmates drinks three bags of milk and plays basketball every day during the summer vacation. He grew a lot during the whole summer vacation. I think, like this method, it has to be used in the development period. I think if you drank milk every day since you were a child, you must be quite tall now. However, you are in high school now, so it shouldn't be too late. Just try it.
About hairstyle: I think if you have a round face, leave some sideburns on both sides and keep your hair longer, as long as it is slightly longer than the inch board. You can ask the barber to give you a layered and three-dimensional haircut. This is not easy for me to express. You can consult with the barber.
I hope the answer will help you.