How do I prepare for upper division classes?

Hi guys! So, I plan on applying for UCLA this summer as a transfer student and I know that the mandatory personal insight question is that of how I have prepared for upper division classes. I’m freaking out a bit because I really want to get in so any suggestions on what I can do to answer the question as well as really prepare myself for upper division courses would be great!

It sounds like a stupid response but just get all materials ready that you’ll need for that class. Login off now y’all.