i recommend MDN web docs, in my experience videos / courses are pretty trash, i prefer to learn from written text since you can easily cross-reference when there's the need, they also have exercises. other CS resources would be of great help, for example to understand what the event loop is since it's just a pretty simple scheduler and i haven't seen any mention in docs about that, i say this because for example you can cross-reference what a scheduler is, what and how it does that + whatever and you'll get some useful insights from that information. but it depends on how much time you want to spend learning and what is your goal.
anyway good luck in your learning journey