Nice sub divided base mesh and mostly the dimensions do seem accurate enough, (of course accounting for camera skewed focal length) I'm also curious if you're planning to continue with your project forward too completion for an eventual portfolio entry? Comparable, as an example to this finalized Jaguar group C racer,…
I think your lighting is really blown out. Maybe drop the volumetric scattering in the directional light or the fog density, and decrease the directional light overall. If the scene becomes too dark, increase the skylight intensity. It's currently a bit difficult to read details in your scene. I'd also suggest to iron out…