Hello Aspirant !
I will suggest you to first choose wisely your undergraduate and start preparing from starting itself.
Then , choose your subjects according to your preparation and interest that what subject you will take as an optional subject in your exams
Many people go for subjects in ART stream like bachelor of art with subject like geography , history , political science etc according to your interest .
Also , you can try for humanities.
Hope it helps , if you have further query please feel free to ask !