YMMV. I chose 'materials' instead of courses specifically since I've found books to be more useful.
A course, or any kind of structured learning, is just a foundation. I would still expect to spend hours outside of the course, but with a good background I can now search for more specific things than if I had started w/ a blank slate.
A course, or any kind of structured learning, is just a foundation. I would still expect to spend hours outside of the course, but with a good background I can now search for more specific things than if I had started w/ a blank slate.