I would say start with learning some basic concepts that most programing languages have, like functions, datatypes, if statements and so on. You can do that through Youtube videos or just by searching it up and look through forums and other things that explain the concepts. After you got a general understanding of these concepts, I would recommend you start learning some basic syntax for JS and every time you learn something new. For example, let's say you learn something new through a Youtube video, don't just copy the thing in the video, actually try to use those things, like experiment with them until you actually understand how to use them. One of the most important things is building things with the language you want to learn don't just endlessly watch videos or search for stuff, actually use the knowledge you got to make things, even if it's something simple like a to do list, if you have a problem try to solve it by making something with JS or any other programming language. Also I would recommend not using AI that much while it might be tempting to just ask AI for something try to figure it out yourself or searching it up through regular means. I'm not saying AI is bad, AI is pretty good when it comes to teaching stuff, but AI can get things wrong too and if you rely to much on AI then at that point you aren't coding you are just prompting, it's best to use AI for trying to understand concepts and stuff like that, also if you use AI always tell the AI to explain the code that it generates and why it uses that code instead of that and so on. One two sources that I can recommend for learning JS, One is a Youtube video https://youtu.be/lfmg-EJ8gm4?si=TzCCY4_DgQmp8dtH
This Youtube video is very long, but if you just finish half of it you should be able to understand allot about JS, at least the basics
and the other one is a website that is pretty good for learning JS or programing languages in general https://www.w3schools.com/js/default.asp