FWIW,I've been hanging wallpaper for more than 30 years. Most of the hundreds of rooms I've done, have had latex paint. I have never encountered any problem that I would have connected to the latex paint. Actually the only time I've ever had a problem with the paint under the paper, was in one house. I thoroughly sealed the walls of three rooms in that house before I papered. A few months later, the paper started popping off of the walls, taking the sealer and original paint with it. I have never seen anything like it. After considerable research, I concluded that the original coat of paint was probably applied to new walls while they were covered with dust. This would not be surprising since most builders spray on the original paint. I suppose it's possible the paint itself was defective or so cheap as to be useless. I'd love to hear more about the article that claims latex can cause a problem. I've never heard that before.

Beautiful pattern! Go with a white that matches the background of the wallpaper. If you have a sample of the wallpaper, take it with you to the paint store to find the correct white. If not, wait until the wallpaper arrives to match it. As for the bedding, the simpler, the better. The wall will be your focal point, so no bold patterns.

Gehenna Vilar, I'm a divorcee after 20+ years. I trying to make a wonderful home for me and my special blessing, my 11 years old son that was diagnosed with down syndrome at birth. I can not afford an interior decorator at this present time. Moreover, I love the time I spend with my son making our house a great home for him. We are fixing one room at a time. This was my first project, my sons bedroom; just ordered his rug.... he loves sitting on the floor the rug was temporary.

IMO a bedroom doesn’t have to go with the rest of the house and I happen to love that aqua but you will need that bedding too.