I agree that you need something that's lighter and gives more contrast. What color will your vanity be? What color is your trim?

Maybe a tan or a pale blue or green, just to give you some proper contrast.

I think an accent wall would be very pretty, maybe a light sage green and some botanical prints. Keeping it airy and spa like.

I think the samples you show are too timid. Pick the darkest color your can tolerate from the granite counter top or the shower floor tiles and use that. Then paint the vanity, trim and ceiling in a glossy Navajo white from Ben. Moore.

Catgo I think just the largest one.

No you have good design bones, and looking at the other pictures looks like you have a nice strong color in the room next to the bath. Real color will make you happy in the room,