The background seems to be a soft calming pale warm grey which I would try to match on the other walls and pick up the yellow in some of the accents such as lamp bases, curtains, cushions, a throw for the bed or even upholster a chair or long bench for the end of the bed if there is room for it. I would use a deeper tone of the grey or an aubergine in some other accent pieces, perhaps the bedhead or bedside tables.

I love Josette wallpaper. I used it on my chimney breast in my old bedroom. Loved it so much, another shade went up under the dado up the stairs and in the hall in my house too. We then moved and we have it now in our new bedroom in yet another shade! I put the paper up in my old bedroom. It’s tricky but not the worst paper I have ever hung.

I don't think it's going to be as hard as you think. I would imagine the top layer is going to peel off relatively easily. Then work on one wall at a time..............score the backing paper ( you can use a paint scraper ), fully soak the wall all over ( using a big car sponge - and i mean soak it ), then go back to the beginning and re-soak an area of around 6-8 feet at a time. Scrape the paper in an upwards but slightly sideways direction, It should hopefully come off ok. Steamers are a waste of time! The old fashioned way, worked well enough for decades! Good luck x

I would box in the pipework as that is going to be very difficult to paper around. I would also get yourself a proper scalpel from an art shop as these are best for cutting paper in situ - it will also be easier if you have paper where you can paste the wall rather than the paper. One issue you will have is around the edge of the fireplace as its such an irregular shape you will really struggle to get a clean edge. I would be inclined to agree with others who have said you will get a better finish if painted - if the wall was painted I would also polish the copper pipes to a high sheen if you don't plan to box them in, its an easy job and looks great when done.