How do I know what I know?

I knew some of the fifty states of America where I only knew Texas and New York because Texas is very big and New York is a very popular place so I searched it up and found out where it was located.

I knew some of the countries in Southeast Asia because I live in Southeast Asia so I wanted to find out where I lived.

I would like to know the fifty states of America by heart because it will then be much easier to answer a question about America using the fifty states. I would also be able to pronounce some of them properly.