This scene will learn you, how to setup lighting and apply texture Also this is free for you.
And you can take this for commercial use. blender 3d model also add more scenes and tutorials for you in short time
we are given all setting screen shot for easy to use. like light intensity. blender camera settings, render settings.
Download Full Scene link - https://blender3dmodel.com/bathroom/minimal-bathroom-design-blender-3d-model/