I really don’t know how its low detail. I mean, there’s thousands of parts, it lags whenever i try to scale parts. If you look closely, there’s individual bolts, the cargo in the cars are fallen over. It’s not high detail, but it’s not low detail for sure.
Looks fairly decent, I do to an extent agree with @MassiveEdu but it’s around mid-poly personally cause it’s not low poly as low poly is extremely cartoony where as mid-poly is within the middle of both low-poly and high-poly. Overall it’s fairly good 100% needs a lot more to be considered a showcase personally as you have only been working on it for only 6-7 hours I’ll give you the benefit of the doubt that it’s still quite good. But need’s more.
Looks great, in my opinion it could look even better with some different colors/textures. I would look into changing some of the parts that are medium stone gray and plastic material, I think that would really bring it to the next level.