Your door handles: is that a mortised lockset that you've built a frame for, or did they come that way ?
I'd love to see a close up of how you mounted them.
next step is to find some porthole windows around 12" or 30cm
fasten door handle and hatch handle(s)
make some brackets for fenders and cut fenders to shape
make rear bumper fasteners (modify original brackets to fit trailer)
and then it goes to painter and will be suitable to tow with bus you saw little few pic earlier in garage.
I stumbled upon this egg again in the garage.
So I rolled it out of the corner, wiped off the dust and looked at what had been done the previous times, what had been planned and what could be done
Then I replaced the hubs with axles and rims,
I put the fender in about the "right place" and I also cut into the arch.
In addition, since I was already cutting, I also made window holes in the doors and tried the windows in front.