Slowly but surely and one by one, the Revit 2019 updates are percolating through to the Revit Developer Centre:
The Revit 2019 SDK has now been properly and completely published.
Now it also appears in its proper location in the Revit Developer Centre at autodesk.com/developrevit, which nowadays points to a new location at www.autodesk.com/developer-network/platform-technologies/revit.
It is a self-paced tutorial guide for a smooth introduction into the programming world. This is a 'one-stop shop' learning path for users who know Revit but are new to programming and thinking about taking the plunge. It introduces the Revit .NET API using the C# programming language.
The accompanying one-hour-43-minute video introduction is still unchanged, though: