How to improve their mental health and better adapt to college life?

Exercise, be strong and energetic, and you will be more confident to serve any difficulties. Ask the teacher more and have a heart-to-heart talk. The level of teachers is generally much higher than that of students, and they have experienced the student era and will tell you how to do better. Study hard. Put all your mind into your study, and you will have no mind to entertain foolish ideas.