I didn't learn from tutorials or walkthroughs, but what opened my eyes to how to do simple things in JavaScript were sites like:
These sites are aimed at showing people the Vanilla JS way to do things people commonly used jQuery to do, but it's not like I knew jQuery either! I learned the most from these sort of sites, just looking up what can be done and re-typing it until it works.
I'm about 3 years into my vanilla JavaScript journey and still only just getting a grasp on the language and what you can do with it. I'm very excited about the future knowing even just a little JS though, I can't wait to do more!