Look up You Don't Know JS - Book 1.
My advice is pick one or two solid resources (verify their usefulness) and stick with them, it's way to easy to bounce around from new course to new course and not actually finish anything.
These two sources worked wonders for me.
Definitely not a waste of time. If you want to start out with webdev, these two books by Jon Duckett are HIGHLY recommended 1 2 . codepen (better for css) or jsfiddle will be your good friends while learning.
If you are going for the regular programming route, I recommend The C Programming Language , but it may be a bit harder for a newbie to start on this book. But it's a great introduction to C and Unix.