Hello, so it depends on what your interests are.

Of course, some people might not have a particular interest.

So, some of the best courses are English Literature, Political Science, History, Journalism, Mass Communication, Economics (subject to criteria).

There are good Art and Culture courses too. For example, the ones provided by Delhi College of Art.

The courses that I have mentioned all help you if you want to go for further research or appear for UPSC etc.

Do apply for aptitude courses, and try to find your interest! Good luck!