Are online resources good enough for learning computer security?

I’m trying to learn more about computer security, but some topics are still confusing to me. I’ve searched for computer security homework help online, but I’m not sure which websites or resources are reliable. I would rather use simple guides, videos, and practice tools that help me learn step by step. I’m also wondering if AI can explain technical ideas in a way that beginners can understand. Has anyone used AI to study computer security? Which websites or tools have helped you the most? I’d really appreciate suggestions from students who have found useful ways to learn this subject.