Not sure what kinda style you like, but for your bedding, I highly recommend layers!
if you got a duvet, get 2 inserts to make it full and fluffy. Then a soft blanket folded out on top (that can also be a different texture) of the duvet cover.
I have two pillows and a body pillow that are different colors (body pillow is a moss green and the two standards are black).
Maybe some decor pillows?
I’ve seen some Pinterest posts where people get fabrics and they place them around on their walls as decoration. then they hang stuff up on them. It looks so cool. Kind of like the whimsical look.
Again, this all really depends on your style, but if you’re down for it, make each room its own character, but of course with some continuity when needed.
For example, my living room is red and black. I have a few posters up and hand made things decorated around that were given by friends.
My dining room is Forrest green and black. I have a crusades painting up with daggers on the sides. It help that the balcony allows a little light in.
The continuity for both rooms is the black furniture.
Just have fun with it. It’s your space! keep in mind that if it doesn’t work in one room, it can be replaced or repurposed :)
