I was a non-developer who didn't even know JavaScript. I listened to JavaScript through games on YouTube's Zerocho channel, and even Jasstone, and I wanted to start React quickly, so I quickly learned the concepts through the React beginner course and listened to this. Since it's a style that explains things based on principles, even non-majors can follow along if they're interested. You can just search on Google here and there for grammar. And the fact that you answer my questions quickly was a great guide.