Totally New to cPanel: What Critical Server Management Errors Are Easy for Beginners to Make?

Hello everyone, I'm completely new to cPanel and website management in general, so please bear with my beginner questions. I'm trying to wrap my head around basic server management and was wondering what critical server management errors are surprisingly easy for beginners like me to make and often overlook when using cPanel. Any insights on avoiding common pitfalls would be immensely helpful, and I'm eagerly awaiting expert replies.