When you start planning to study abroad, you need to consider your GPA (Grade Point Average), credit requirements, and credit equivalences for different courses that you want to take at the university abroad. This will help you with making decisions as you move between two different universities (Chuo and the university abroad).
Remember also that when you come back to Chuo, you may want to get credit for the courses that you have taken at the university abroad.
This link will help you start to think about these matters:
中央大学の留学制度概要（中央大学の国外留学制度を紹介）
>>> What questions do you have about GPA, credit requirements, and credit equivalences?