Not to worry about hydrogen, Alex. A fuel cell based on methane--already available as natural gas--would do the trick and we already have a distribution network in place. I believe some materials such as activated carbon and perhaps carbon nanotubes readily absorb methane, so need for high-pressure storage tanks or cryogenic delivery of liquid hydrogen. Flue cerlls run hot, though, so we still must content with high temps, which can limit use in vehicles.
Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.