Well, it depends. If you are a normal student, it may be difficult to find a job in the future. If you don't want to be a teacher, you must learn something else when you go to college. It can be related to mathematics, such as computers, economics and management. It depends on your interest. If you want to be a teacher in the future, you can prepare for the postgraduate entrance examination from now on, because there are too many people majoring in mathematics in big cities now, and teachers are completely in short supply.
If you are not a teacher, it depends on the bias of your school. For example, if your school is biased towards statistics, you will have to prepare for the civil service exam in your junior and senior years. If you are a computer, you can actually try to find some part-time jobs now. In fact, there is still a shortage of talents in this field, although there are many people studying.
I hope I can help you.