[WoodenChair]

As a starting point, if you have little background in NoSQL, I strongly recommend this 1 hour talk by Martin Fowler: https://www.youtube.com/watch?v=qI_g07C_Q5I

It's slightly dated, but it still gives a strong overview of the different paradigms. The truth is what you want to learn probably differs greatly depending on the paradigm that fits your application. NoSQL databases can broadly be categorized into document-oriented, key-value store, columnar, and graph. This video will help you understand what (at least three) of those are. Then you can focus in on books/articles about the paradigm that makes the most sense for you.