Hey, this is really cool! I love the detail you've put into it, I was working on it for about 5 minutes before I saw the tree out the window
I like that you've kept the contrast low on the wallpaper so it lets the other elements stand out.
I made a few adjustments - changing the shading on the pillars to match the light source more, moving the highlight on the pot further from the edge to suggest roundness, and changing the lighting on the windows.
I also added a highlight to the candle to make it stand out, but that's just my personal preference, you may want to keep it subtle.
I like the picture, perhaps it's a bit close to the pillar so it feels squished?
Hope that helps, keep it up!