MIT OpenCourseWare provides a this course for free.
Given its prominence to neural networks and quantum computing, now is a good time to learn Linear Algebra.
MIT A 2020 Vision of Linear Algebra, Spring 2020Instructor: Gilbert StrangView the complete course: https://ocw.mit.edu/2020-visionYouTube Playlist: https://www.youtube.com/playlist?list=PLUl4u3cNGP61iQEFiWLE21EJCxwmWvvek
Professor Strang describes independent vectors and the column space of a matrix as a good starting point for learning linear algebra. His outline develops the five shorthand descriptions of key chapters of linear algebra.