Looking for a thorough Javascript/Jquery course!

Hey y'all!

I've reached the point where I'm very comfortable with my CSS knowledge, but feel limited with my broken understanding of the script languages. I've studied a bit of info off of w3schools, but I am looking for recommendations for any resources or courses that do a thorough job of explaining java/jquery - and then understanding how to apply it in a context such as SS.

TIA!