Hello, identifying your passion is always a good thing no matter when you identify it. The management studies in abroad will usually require an 60 percentage in your undergraduate, language proficiency test like TOEFL,IELTS and GMAT exam. Each institution may ask for varied requirement when even located in the same country. Solving both logical and Quantitative reasoning on a daily basis along with newspaper reading will be your starters. Giving emphasis on economics and knowing in depth concepts in management which you would have studied in your ug will be the further move.
You can refer this link to know about the various exams
Some of the top QS ranked institutions are INSEAD,CEIBS,ESSEC,NUS,University of Hong Kong, IIM Ahmedabad
Best wishes.
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