I am studying French in a training institution now, and I have plans to go abroad. Do I need to get B 1 or B2?

Generally speaking, if you study abroad, you need to reach the B2 level of the European standard system. A 1A2 is the basic level, which is generally applicable to interests, tourism, etc. B 1B2 intermediate level, generally suitable for studying abroad and working. C 1C2 is equivalent to advanced.

No matter what level, since you want to study abroad, I suggest you continue to improve your language level in order to study and live better. After all, there is no end to learning.