I would like to know about CS course,as how it will it help me in getting more insight about finance domain as, CS is law oriented course.

I am interested in finance and pursuing MMS course(Finance).I am also thinking to do Company Secretary course in the next year.Hence,I would like to know how should I synthesize it with finance sector as it mainly focuses on law.So,should I do CS or else try for Chartered Accountancy,etc.