If you want to study computer, you should first pay attention to whether there is a major called "Information and Applied Science" in your mathematics department. I am majoring in information and applied science in the School of Mathematical Sciences of South China Normal University. It is biased towards computers. If you are interested in changing computers. I suggest you learn programming well. If you have this major in your school, you will be exposed to discrete mathematics, data structures and algorithms. These courses are all important compulsory courses of computer, so it is recommended to study hard. Moreover, in college, you will learn a god lesson that can't be taught in any other subject-numerical analysis. This course will enable you to learn the numerical correlation algorithm of computer, far beyond the computer background. Of course, you are still a freshman. Take your time. Information and applied science majors will not find it difficult to find a job even if they choose a job after graduation from college. Of course it has something to do with your level. Anyway, I graduated from college, and there will be no pressure to find a job. It doesn't really matter if you don't take the postgraduate entrance examination. If you really want to do research, you must go to graduate school. If you just want to find an easier job and get a higher salary, I suggest you do the formalities well when you are an undergraduate. Do it not by your education, but by your ability. And it industry experience is more important than education.

This is just the opinion of someone who has experienced it. The development prospect of mathematics is very rich. I hope you work hard. As for which direction to choose, I will take more courses in my freshman year to see where my interests lie. I wanted to be an actuary when I applied for mathematics.