Nearly 
You have one actor = foliage.
It contains instances of instanced meshes.
Let’s say I make some foliage using 3 meshes. A cube, a pyramid and a sphere. There is still only one foliage actor ( always ), and it has 3 components ( the meshes ), and there are instances of those meshes.
There might be 200 cubes, 2 pyramids and one sphere.
The foliage actor sets up a cube ready for instancing, and creates 200 instances of it, same for the other shapes. You never see the instanced meshes, just the instances of them.