FAQ page with pure Javascript

What are you most proud of, and what would you do differently next time?

This is the second time redoing this project, I'm happy it turned out better

What challenges did you encounter, and how did you overcome them?

Writing the Javascript in short lines

What specific areas of your project would you like help with?

If you have any idea of improving my code generally, and if you have any idea of how to make the first question display answer without having to re-write all the Javascript code