First, make good use of tools. After all, you have come to the university, and your horizons and knowledge have been greatly improved. In the past, when we were in high school, the only tools we borrowed were extracurricular books bought for us by teachers or parents. But that's all. It's just different in college. The university has a very large library. When I was in university, the combination of all kinds of information and the Internet led to the rapid development and dissemination of all kinds of knowledge. Maybe you haven't heard it before, but after you go to college, you can hear it. Then these are undoubtedly the key to solving your problem. Moreover, the tools you can borrow in college are not only the knowledge in books, but also the research and practice in the laboratory of the school if possible, which is very helpful for you to understand the topic or solve the problem.
Second, communicate with teachers more. The biggest difference between university teachers and high schools is that university teachers don't just talk about the knowledge in books, but expand it wider. Relatively speaking, it will be more practical. Moreover, many university teachers may extend your questions and take you to another level of research, which is very interesting and meaningful for learning. Moreover, university teachers will have higher academic qualifications, which may be of great help to your future postgraduate entrance examination.
Third, be good at association. Many knowledge points in universities are not single, but linked with many disciplines and many courses. It is difficult to solve a problem if we only study it. You might as well spread and expand his problem-solving ideas. Maybe the answer will be faster.