Who can answer my worries about studying abroad?

The nearest way to study abroad is to go to South Korea. The cost is low and the possibility of getting a visa is high. Of course, South Korea also has its weaknesses. You have to compete with China's 2 million Koreans for language. In addition, South Korea's corporate culture is difficult to identify with.

It is best not to think about it in English-speaking countries. The cost is high and studying is more than 50% harder than in Asian countries. For example, if you take 6 courses per semester now, you will need three times the workload in the United States and Canada, and you cannot miss classes.