Teachers college

Currently, I would like to become a lawyer and I’m thinking about going into political science then into law school, but I should probably think of backup jobs incase that doesn’t work out. Currently, I am thinking of becoming a teacher if that doesn’t work out, and eventually become a university professor or a school principal. I was wondering if doing an undergraduate degree in political science allows me to enter teachers college? I did some research to find that I would need 2 teachables for high school, and was wondering what those would be if I am doing a political science undergrad. I understand that becoming a professor or principal would also require more schooling, but that wouldn’t really be an issue for me. Any advice would be appreciated, thank you!