if you've had college level linear algebra, probability, calc before, there's lots of good review/reference materials https://www.reddit.com/r/MachineLearning/

if you've had college level linear algebra, probability, calc before, there's lots of good review/reference materials https://www.reddit.com/r/MachineLearning/comments/1jeawf/machine_learning_books/ https://www.reddit.com/r/MachineLearning/comments/1jeawf/mac... https://www.metacademy.org/roadmaps/cjrd/level-up-your-ml https://www.metacademy.org/roadmaps/cjrd/level-up-your-ml I think the Prob books by Sheldon Ross are good tho there's negative Amazon reviews, and the three LA texts by Axler, Strang and Insel/Friedberg/spence are worth buying (older editions for < $25 shd be good enough