how to lighten vagina from shaving?

actually talking about my vulva but i shaved and it's all dark. i waxed some of the top part of it (my sugar wax kept failing so i eventually gave up and shaved) and that part isnt dark. just the part i shaved.

how can i lighten my skin? i have this issue on my armpits as well and its from shaving. i really cant afford to wax to avoid this so what else can i do to lighten my skin (i realize i can look it up but i wanted to hear methods from someone that it worked for)