I have hard water and my glass is etched on my old shower unit. I added frosted window film on the outside to make it look nice till I had saved up to replace the shower.

Very Pretty. I would paint the beadboard white so the vanity doesn't disappear. Maybe paint above a lighter sage than the vanity until you can wallpaper.

Easier decision once you see everything together.

I think it would be more impactful with wallpaper.

Maybe skip the bead board for a less broken up feel (compare to the above).

ChatGPT was used/pretty simple to learn.

Do you need upper cabinets? I don't think upper cabinets when I think of a dry bar. Open shelving yes, upper cabinets no.