First of all, the economic foundation is the most important. Take the United States as an example (because I am in the United States, I am familiar with the United States). If I can't accept the annual fee of/kloc-0, I don't want to go abroad. In addition, students are not free to work with visas.

Secondly, in fact, I don't think age is a problem, as long as you study hard. Now the oldest student in our class is older than my grandmother.

Most foreign undergraduate courses are four years, or one more year is allowed. But some majors will be different, such as medicine.

This situation can only be applied for undergraduate freshmen.

I hope it helps you.