With a nice clean space like that you can go a lot of different ways. I would start by looking at shower curtains, because they can become the focal point. When you find one or two (or more) that you like, you can play off of the colors in the curtain to find the color towels, bath mat, and even wall color. Some ideas: You could go classic black and white, with a touch of something bright if you want for an accent (like the fuscia in the photo) Or something "spa-like," in acqua and cream. Or you could go bright, with teal and lime green. Another classic look: tan walls, white and/or tan towels and bathmat, simple white accessories. Good luck!

However you hang it, keep in mind that once the sheer fabric falls in front of the back fabric, the sheer will change color. So, let’s say you have pulled back the thermals, but not the sheers. Where the sheers hang over the stacked back thermals will not be the same color as the rest of the window. It doesn’t sound like a big deal until you see it. It is very obvious.

Just under the cornice, use same rod height for all openings even though doors are shorter.

An entire wall of built-in cabinets and hooks and cubbies for your crafting stuff (and perhaps filing-type stuff and printer for the office). Take a good look at what you have and think about how best to organize and store it and what could be displayed to be pretty and what should be hidden behind curtains or doors. A fold down ironing board on a wall or back of a door somewhere would be great. A nice desk and filing cabinet for the office side... or perhaps a great big table in the middle under the window, wide enough to function for both of you facing each other? A nice curtain rod would make a big difference too. Preferably just about floor to ceiling. I'd put a splash of colour on the walls and keep the curtains simple, but you could go vice-versa too. Something like this: [https://www.houzz.co.nz/photos/modern-bungalow-phvw-vp~4999540[(https://www.houzz.co.nz/photos/modern-bungalow-phvw-vp~4999540)