Due to the underlay under the current other tiles, the wall tiles would be too low.

Hi Jacob, That's really helpful, thank you. I might give SketchUp a try. It seems like a tool that would be good to learn.

I'm a beginner woodworker, although I did a furniture making course last year. For my first solo project, I'm thinking of making free standing privacy ...

Thank you @EricL, I mentioned why I can't change the vanity top in my initial post.