Ironically the very first coursera course was (IIRC) Andrew Ng's machine learning course, which was fantastic, and the deep learning specialization, which was a

Ironically the very first coursera course was (IIRC) Andrew Ng's machine learning course, which was fantastic, and the deep learning specialization, which was also phenomenal. I can unironically say that Andrew Ng was the best instructor I ever had in grad school (and I didn't go to Stanford...).