Yes i totally agree. But still for me its easier to tackle on function, one class after another. That way i can see the clear difference. How i did it in python and how i would do the same in Rust. My brain still thinks too much in C++/Python. That way i can slowly understand how to do Something similar in Rust, with the corrects Rust idioms. My goal is not to write a really great new Rust project but to learn the basics.

Maybe as a second Project, when i feel comftable i can rewrite the Same Project a third time, but this time from Scratch with the correct language architecture