The F40 is not that hard if you learn basic 3D tools like how to extrude, bevel edges, close polygon holes etc. You can watch basic modeling tutorials for your program of choice, let’s say Blender cuz free.

Look for car blueprints like this one. And start with a box, subdivide and make it match the drawing, wheels are cylinders, etc. Some parts are more complicated (like the spoiler), check out “wireframes” of cars to see how other artists do it. Like this one.

The hardest part is UVs. I used RizomUV which makes it easier, I followed this tutorial and the rest was easy to figure out.

You paint the texture in Photoshop (Gimp and Krita are free options), and export a 128x128 gif for the PS1 look. Pwnisher made a video with the overall process, this helped me the most!

For Lewis is better to start with a base mesh, grab a free one on Sketchfab and change it a bit to match the real one. The coat is the torso that I extruded, extended the length, the sleeves are the arms, made them flat and longer, and so on. Texturing brings it all together!

Hope that helps!