i've been all over the place. khan academy was really good for calculus, but man, the linear algebra lectures are really long, w/ no quizzes to keep you practic

i've been all over the place. khan academy was really good for calculus, but man, the linear algebra lectures are really long, w/ no quizzes to keep you practicing. Have read parts of multiple textbooks. Have watched 3blue1brown's excellent series. I've gotten stuck a lot and keep looking for one resource that's 'got it all', but haven't yet found it.