Everything looks not bad, especially the details and props my only recommendation would be not to throw random props on the walls, all warehouses are different you could try placing some hazard marking tape going along the entire wall. Give the ceiling a bit of details as it looks rather plain and bland.
In the future try using some reference images as it would definitely give you a feel on what details to add on the ceiling and walls, if your lacking on what details to add to improve this more further. I personally think you could take the approach with detailing the ceiling a bit.