Great question! I faced the same struggle when I was in college. I wasn't sure of what to choose as my major, so I ended up taking almost every intro class (such as economics, political science, sociology, psychology) during my freshman year. I was conscious about not limiting myself to ones I thought I might not like.
I started to narrow down the ones I naturally enjoyed learning about, and started taking more classes in those areas. Personally, I enjoyed learning about the law and society, so I ended up majoring in Political Science and minoring in Sociology.
I hope this helps! Good luck!