3D printers will never be as ubiquitous as conventional printers because they are used for vastly different purposes. There are a lot more frequent needs for the printed word and pictures than the need for specific parts or objects.
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.