First of all, you need to buy some textbooks for math majors, study systematically, and understand the exercises and examples in the books. If you don't know how to ask a math major or a teacher, you must understand, because every section and chapter are related. If a part is unclear, it will affect the subsequent study.
Second, the information age is becoming more and more developed. We can learn through online video, and it will be much clearer if there is a teacher's explanation. Follow the teacher and consolidate the review in time after class. Online learning has brought us a lot of convenience, and we can communicate with teachers in time through WeChat Weibo.
Third, we must remember the theorem clearly in mathematics learning, so it is more convenient to learn. Many problems need to be obtained through theorems. We must prove the theorem in advance and master the whole process of proof, so that we can master it clearly and do the problem more conveniently.
Fourth, the study of mathematics also needs learning tools. We should be familiar with MATLAB software, which is the most basic experimental course of mathematics. We can borrow a MATLAB textbook and practice with simple programming. Since you choose to teach yourself mathematics, you must learn it well. Now is the computer age, and all learning is inseparable from the support of computers.
In short, as long as we make unremitting efforts and have scientific learning methods, we will certainly learn mathematics well.