1, your body shape is completely ok. Go to the gym to exercise more, not to make you practice fast, at least wear clothes in summer. People also appear more energetic and sunny.
2, hairstyle is very important, personally think it is best to have short hair. Find someone to design and learn how to shape yourself simply.
3. Needless to say, wear light makeup and make-up contact lenses. Tutorials are everywhere on the Internet.
4. Clothes should be decent and generous, and how to match clothes with your study area. It doesn't have to be a famous brand.