Professional exchange needs to be changed after one semester.
Professional exchange has its requirements, such as your excellent ranking in the college.
Of course, you have enough contacts and money to use directly.
In fact, college majors are almost the same. Unless you are a particularly unpopular major, your major does not hinder your interest or even self-study.
Go to the college to find the dean or the head teacher of a grade, or the senior. Information collection is the most important.
I wish you success!