If you want a good theoretical foundation based on maths, Caltech's Learning From Data course is good: https://work.caltech.edu/telecourse https://work.caltech.

If you want a good theoretical foundation based on maths, Caltech's Learning From Data course is good: https://work.caltech.edu/telecourse https://work.caltech.edu/telecourse You need to be not afraid of doing proofs of theorems (most of them have to do with stats because machine learning is basically stats on steroids).