Its a good start, I like how you have the large open space its very appealing architecturally speaking. However, I can see some issues right away. The bricks in your wall material are too large and the lighting can use a lot more refinement. I recommend observing photos withing a similar setting and try to mimic the lighting. Lighting and materials are the two most important factors in archviz.
The material you are using for the window frames is too dark (avoid using pure black) you should consider toning it down a bit.
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The material you are using for the window frames is too dark (avoid using pure black) you should consider toning it down a bit.