I want my bedroom to be stylish and cozy.

I've never had an eye for decorating, so I'm hoping you all can help me! My bedroom is small. I'd love for it to feel dark, cozy, and stylish with a touch of hygge to it. When I moved in, I wanted to add some color, hence the dark blue furniture and contrasting yellow pillows. I'm also going to hang the Klimt painting. I just haven't gotten to it yet.

Any help would be appreciated.