The Best Way to Learn Magento 2
The very best way that I have found to figure out how to develop with Magento 2 is to write unit tests for a module. It not only requires you to figure out how to work with phpunit, but to also look at the existing codebase for examples of how the Magento 2 team works with the same objects and handles the same kinds of tasks. Once I wrote a full set of unit tests for my first Magento 2 module, I felt that I had a much better grasp of the workings of Magento 2 than I did before I started writing the unit tests.
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