2D drawing and Drawdel

Before working on drawdel, I worked on the second drawing, which in my case, axonometric drawing that is composed of sections.

I have draft version of the drawing. I personally like the one on the top because each section looks more clear. I am planning to use 3 line weights. The liminal space( which is the medical school with columns) as the darkest, the rest of the section dark and the plan that is underneath as light. I will use this drawing as a reference for the drawdel.