I tried this... I went a shade lighter than my normal shade, and actually wasn't too bad, you are apparently meant to use the black plain panels to dab excess off... So there's not as much product... Then it sort of gives a lovely natural finish too
You are cool toned but I think you want to say that the tone of your skin is neither yellow nor pink so it has a neutral tone to it. But undertones are never neutral.
This isnt the lightest shade available!! The lightest shade is 13C, so much much lighter than this! I have 13N and it is absolutely incredible, the technology in this cushion formula is insane, highly recommend. The hardest thing is finding a shade match though, as it isn’t available in any stores in the Uk right now, I believe.