As RedPhantom and I mentioned, you have way too many lights in your scene.  I counted 10 lights on your Light Controls.  There is a Python Script where you can delete all your lights at once.  Delete the lights and start introducing them one at a time.  Take a moment to play with just one light and change its characteristics.  Cycle from Infinite light through Area light and see how each one illuminates your scene.  Don't rush this process.  You are trying to create a project without understanding what you are doing and that is going to lead to frustration, especially when you haven't developed the skills yet to change figures/props.