If you are coming at this from a CSS/Design/Front-End point of view (and it sounds like you are), understand how JavaScript relates to the DOM (Document Object Model). What is the window? Go through the many methods of accessing elements in the document (you can do this directly with "raw" JS, you can use a framework, try all the methods you can).
Understand the DOM, and where JavaScript fits into it. Then you'll understand much more about how to use it.
If you are coming at this from a CSS/Design/Front-End point of view (and it sounds like you are), understand how JavaScript relates to the DOM (Document Object Model). What is the window? Go through the many methods of accessing elements in the document (you can do this directly with "raw" JS, you can use a framework, try all the methods you can).
Understand the DOM, and where JavaScript fits into it. Then you'll understand much more about how to use it.
Thank you so much for the advice, Ben!