3D is always super complex - the "stuff they pay you for" - if you try to make production quality materials. If your aim with 3D is a simple mockup or placehold

3D is always super complex - the "stuff they pay you for" - if you try to make production quality materials. If your aim with 3D is a simple mockup or placeholder for illustration purposes, based off an existing reference image or floor plan, you can make big strides relatively quickly. And the same goes for most specific production tasks - you just have to break it down into the concepts that are relevant, and then getting comfortable with the selections and edits that apply those concepts. Blender helps things along by having defined workspaces for different tasks so that you can browse a little bit and find things without going too far out into unrelated stuff.