For linear algebra basics, I also especially recommend 3Blue1Brown's youtube channel and his "Essence of" series: https://www.youtube.com/watch?v=kjBOesZCoqc&l

For linear algebra basics, I also especially recommend 3Blue1Brown's youtube channel and his "Essence of" series: https://www.youtube.com/watch?v=kjBOesZCoqc&list=PLZHQObOWTQDPD3MizzM2xVFitgF8hE_ab https://www.youtube.com/watch?v=kjBOesZCoqc&list=PLZHQObOWTQ... I've never seen the material presented more clearly - it's completely visual and focused on building intuition first.