I have a different take on your room, in that the moody/casual/modern feel should be enhanced vs heading towards glam. Suggest this type of look (your curtains are perfect, but layer your bedding).
Skip the wallpaper, for lots of reasons, but choose the paint color last.
https://christinamariablog.com/best-green-paint-colors/
With the money saved by not papering, accessorize! Start with a rug under the bed, which will have a huge impact.
https://www.etsy.com/ca/listing/1326136622/yellow-detail-green-rug-modern-pattern?epik=dj0yJnU9QVRFc2MtWUFzcUIxcUd1SzNib1RxSHdCQVNwX3FhRDkmcD0wJm49c0UzcXlCVm9xWk1JcUJtbG1veUtEZyZ0PUFBQUFBR1Q1dnJV&variation0=3650140695
Larger lamps for sure/or plug in sconses.
If you have a lot of empty wall space, add some art and even a full length mirror.
Q
Home design
Q