Beginner frontend dev relying too much on AI — how do I become independent?

I’m currently learning web development. I’ve completed basic HTML and moved to CSS, but I find CSS harder. I use AI tools frequently because I struggle to write CSS on my own. I understand the code when I read it, but I can’t build layouts independently yet. I’m aiming to get a basic frontend internship, but I’m worried that relying on AI means I’m not actually learning properly. Is this normal for beginners? How should I practice so I can become more confident and write code without depending on tools?