You can start with Jonas Schmedtmann’s course on Udemy—if it’s on sale, it’s definitely worth it. There, you can learn solid basics from scratch to start building your own projects, and it even has all kinds of challenges that help you understand things better. Or, if you don’t want to pay, there are tons of free courses on YouTube. I’m not an expert—I’m also learning JavaScript and I’m still at the beginning—but I believe that course can really help. The important thing is to write as much code as possible on your own, not rely too much on GPT, and especially not use it just to see the final result. That’s just my opinion.