That's what I'm trying to figure thnaks to you all !
The libraries work, the Arduinos too. I'm not saying anyone other than me did his job wrong. But I sincerely do not understand what doesn't work (and have in parallel the same kind of issues with my Python code, maybe I'm just cursed). I ordered a new bunch of NRFs, hope this ones will work well enough.
It would just bother me if it was that, because I would be losing a lot of time for stuff I can't do anythin about, that's why I'm trying to find my mistakes as soon as possible.
Sorry if I look nervous