Big project help with file handling and workflow

Hello, I am an interior designer and for the past year i worked a lot for the Porsche AG. I am doing the renderings for the shows around the world, but i would like to have a talk to somebody and show my files to get some more advanced info on what is going on and how to handle certain things. I am working in this field for almost 15 years and i have used numerous programs over the years. All in all i would like to talk to somebody that has really in-depth knowledge about Blender 2.9+ . My question will relate to material/shading/file size handling mostly. I have several project that we can have a look at to help me increase the overall preformance of the file and so on.