Secondly, finance, economy and management belong to a category with higher requirements for mathematics. In addition to the most basic advanced mathematics textbooks, we must learn other branches, because we must establish specific mathematical models;
Finally, no one is born good at math. When you say that math is not good, you just mean that high school math is not good. As long as you are not too stupid, everything in college is equivalent to a fresh start, because calculus, complex variable function, series and other specific knowledge are completely different from the high school system. Of course it does, but it doesn't mean that high school math is not good and you can't learn it well. So you can teach yourself completely, as long as you don't spend too much energy, it will be of great benefit to you. At least I finished advanced mathematics in high school, and then my understanding of mathematics is better than that of ordinary people.
I hope it helps you.