Creating blueprints from SketchUp model

I would like to create a blueprint from group or component created in SketchUp. After importing in UE I get the geometries but they are independent, not in arrangement like in Sketchup group/component.

For example, this desk from SketchUp would be nice simple blueprint.

I watched learning videos at ** **and in particular Create Blueprint from Actor talks about it but it was a simple, single geometry.
Any guidance is appreciated.

Thank you.