Get a first overview of Flow and a working example within 15 minutes with the Flow Quickstart or take the time and work through the Definitive Guide.
If you get stuck, never hesitate to look behind the scenes and check how the internals of Flow work. Also make sure to make friends with the Public API and our Coding Guidelines.
Last but not least we have collected some Slides and Screencasts for you.

Note: Some parts of the documentation are still incomplete or missing. We constantly work on this, so make sure to check back!