Way of Success

I mixed all of my thinks.Because I can't choose my goal .But I say to everybody "I have a goal ,this is dream" .Today I start to research on my wishes ,dreams .I have 3 ways for success .Because I think so I'll get success on 3 ways ,so i can only choose one way .Firstly I study in chemistry faculty .I can get success in chemistry .2nd is IT (information technology ) i don't study for IT but I have interesting for IT .3rd ability and interesting to International Relations and Leadership .I think about them .Chemistry is my way ,IT is my interest and Leadership is my ability.
So I think which way I have to choose...?