Nice job!!!
I built a garage diorama that I presented to my son because he and his friends used our garage to work on their cars. He was 18-20 then 38 now.
I added many of the touches you have like magazines, pizza boxes, parts boxes, soft drink cans, oil stains, grease, spare parts on the floor/workbench, etc.
It got to where I just had to tell myself "STOP". Detail is cool but if you aren't careful the project will never be completed.
There is just so much detail stuff available. Either for sale or instructions on how to make your own.