Completely agree. To second one of the siblings- a really good set of visualizations which really helped me develop intuition for linear algebra (as mentioned

Completely agree. To second one of the siblings- a really good set of visualizations which really helped me develop intuition for linear algebra (as mentioned by a sibling) is 3blue1brown's excellent series "The Essence of Linear Algebra". https://www.3blue1brown.com/topics/linear-algebra https://www.3blue1brown.com/topics/linear-algebra The animations really helped me to understand what eigenvectors, eigenvalues, linear transformations, determinants etc are