I have no advice and am assured that you will get a lot of good ideas from the wonderful people here. I just want to say what an interesting pedestal sink you have. I don't believe that I have ever seen one with expanded sides. Thank you for posting and good luck with your project!

Hoping you’re right! Love the pedestal sink for that reason, brand is kohler :)

How about some color? The current creamy walls do not look (at least in these photos) to be a good match with the cooler white and gray shower tiles.

Light blue, soft sophisticated green, even pale pink ... Could be lovely!

Something like this would work with your flooring and shower tiles.

Wainscotting is a bad idea with your tankless toilet with controls in the wall above it. I agree that the warm beige color clashes with the cool white background of your shower and floor. You can go with cool colors of any shade here. Maybe get some samples and see how ”deep” a coor you are abe to tolerate? Paint on some of those boards at paint stores that are made to imitate wall texture, or ask on Freecycle or other community boards near you if anyone has several pieces of unused drywal that are at least 2 ft x 2 ft or larger. Chose some colors, prime and paint your drywall, and live with each board for a few days to see how it makes you feel. I think that a darker wall paint will make your interesting sink really pop!