Thanks for posting!! I have some experience with bathroom makeovers, as recent as our master bathroom renovation in OMG We Bought A House! You can follow the process from the beginning of season 3, or just scope the final result for inspiration! If you’re looking for more decoration inspiration, I have a video about making over a bathroom into a relaxing oasis!! It’s full of tips and ways to make your bathroom lush and complete.
As far as the stairs — that isn’t an area that typically has a ton of ground space, so I would focus on the walls. A gallery wall that goes diagonal with the direction of the stairs could be really interesting! Check out these ideas for different types of frame arrangements to find what is best for you!