i can't provide the assembly-csharp.dll and what isn't working? did you not install bepinex correctly and put the mod menu somewhere else or something?
im not sure but i followed both your guide and fasguy's guide and it didnt work
also can you make a guide for mac if possible
for mac it should be the same process as on linux and windows, if you can't install it i may make a video on it sometime
here