How to choose effective MOOCs for machine learning and data science?

Bill Gates proclaimed in a recent graduation ceremony, that artificial intelligence (AI), energy, and bio science are three most exciting and rewarding career choices today's young college graduates can choose from. I have come to believe strongly that some of the most important questions of our generation - related to sustainability, energy generation and distribution, transportation, access to basic amenities of life etc., are dependent on how intelligently we can mix the the first two branches of knowledge Mr. Gates mentions. I am a semiconductor professional with 8 years of post-PhD experience in a top technology company. I take pride in the fact that I work in the cross-section of physical electronics which directly contributes to the energy sector. I develop power semiconductor devices.