For the docs, have a look here: http://www.c3-lang.org
With a primer for C programmers: http://www.c3-lang.org/primer/
It should compile fine on MacOS and Linux. There is CI for Windows but the readme is missing install instructions for Win. This might be helpful to get it up and running on Windows: https://gist.github.com/kvk1920/57e1851d106bed86ded8c3232895...
I am happy for all the feedback I can get, even if you just hate it completely :D