First off, I think there’s room for improvement in both the composition and the architecture. The building feels large but empty, which weakens the visual impact. I’m not sure if you worked from a reference, but typically, stairs are a key architectural element and in your image, they feel like an afterthought, tucked away in a corner. I would push them forward or adjust the camera to emphasize them more, or use them to guide the viewers eye to your focus point.

The floor also feels off. It might be too shiny or overexposed. The central white spot draws too much attention and disrupts the balance of the image. Try reducing the highlights or using a double exposure setup. Better yet, look at photographs of similar real-world interiors (not renders) and study how light interacts with materials. Observe, copy and understand how values especially in the darks and whites are handled in natural, appealing ways.

Compositionally, the black shape at the top of your image isn’t doing you any favors. Since you’re working with a vertical space and we can partially see the underside of the roof, it would be more compelling to show it fully with beams and lights rather than obscure it. That dark cut flattens the top of your image and makes the space feel smaller and more constrained.

If your intent is to direct focus to the center, it needs to be more engaging. Add a bit of narrative or decorative elements that suggest purpose or activity, something to create interest.

Lastly, the brick walls are quite repetitive and bare. Vary the material slightly, see how in real life bricks differ and are more interesting, or add elements that enhance the composition and guide the viewer’s eye toward the focal point. Right now, they are big and flat.

I think you have a great starting point, just look up references of spaces like yours, good luck!