How about watching the Epic Games Tutorials for the Unreal Engine 4 on Youtube.
There is also a C++ Tutorial Series.
Normaly you create a class in c++ with some properties and components. For example
a StaticMeshComponent.
Later inside the Editor, you would create a BP of this class. You would import the fbx file
into the editor and add it to the BP StaticMeshComponent. Now you can place it inside your
game scene.
I think this is the most simple workflow for a c++ beginner and you learn most of this
in the Tutorials on Youtube.