If you want to find out more about choosing a major go to: http://findyourmajor.illinoisstate.edu/explore/.
Once you log in with your ULID and password, click over to the "Academics" tab.
From there, you'll see a link for "Academic Applications," and under that, "Apply to My Program."
Clicking on that link will take you to Illinois State's online "Apply to My Program." Here you can not only submit an application to any major on campus, but also go back and review any application you've submitted, as well as check the status of applications you've submitted.
So if you feel you're prepared, go apply today!