Help for architectural visualisation rendering/Light setup

Ok…thanks a lot! Until now i only use a slight normalmap. I will play around with the roughness a bit.
What i still don’t understanf is how to get the left side so bright and the right dark on the floor without loosing the shadow under the left cupboard…

I use a directional light but some other lights as well to get the reflections on the floor. Is that the right way or too conplicated?