I think if you look online you will see tall headboards that are more cost effective than making your own. Tall headboards give a modern look do perhaps you should put a roman blind at the small window. Something should also be the same height as the window- this doesn't have to be the headboard- it could be a picture. If you are just going to paper one wall I say do the wall opposite the bed as the bed wall has plenty going on and when you sit in bed you will want something to look at.

I think you need something like this >> https://www.wayfair.co.uk/Williston-Forge--Dempster-Accent-Mirror-V112098371-L41-K~U001987260.html?refid=GX486325739925-U001987260&device=c&ptid=903378841349&targetid=pla-903378841349&network=g&ireid=105367099&device=c&gclid=Cj0KCQiAjJOQBhCkARIsAEKMtO3GTO0WXvk0SGvhpPWqif_w1pPey6jH3PpQ8F_FHy5tJQ0fMQ-A5noaAkInEALw_wcB You fix it to the wall but it is flexible and you can turn it other ways so it doesn't stop your access to the window. If you are looking to upgrade this bathroom a bit, please contact me. I can provide orthographic drawings in AutoCAD to scale, along with a 3D model for you to imagine the design before investing in it. This way you will be able to make it feel slightly more modern and use the maximum of the given area, as currently I just think that it isn't using its full potential. Either way, good luck with your project! 😊

My first thought was putting the bed near where the radiator is as there are sockets for lamps etc. My second thought was the wall opposite, then lastly putting the bed with the headboard under the window. As to decor, it does depend what colours she loves and her favourite things. Here’s a few “girlie” ideas which may, or may not, appeal to her. The first one is all sorts of pastel shade which are lovely if you want to avoid too much pink!

I would go with three or five, beautiful restful colours. I would also align the tables and lamps to the centre of each panel. Would that mean getting a bigger bed? I recently downsized from super king to king and now can’t wait for an excuse to go back to super king. Chandelier looks fabulous!