We made quite some progress, we worked in parallel on the code and on the wiring. We encountered serious difficulties when using the Libre Le Potato card as it doesn't accept common Raspi libraries for the GPIOs so beware when you're using the gpiod library as it is not well optimised and uses lib libraries which are not always updated. But we finally managed to make the motor spin after a long night : Spinning Motor Video (don't mind us whispering, it was very late)