Rendering Advice - Twinmotion

I have recently been using Twinmotion, and I was wondering what are things or tips I could use to make the attached look better.

Image 02_000

The fire looks really bad, and the main light in the scene is lighting things up too much, and the shadows are too sharp, real lights have a physical size where the bigger the light source is the softer shadows will be which will make things realistic.