I added a couple of lights of different colors (orange, red, white ...) and with different intensities. I've used a Focal Distance function to make the background blur. I also make the camera function "ToneMapScale" little lower, to make it darker And I added the smoke manually in another program because I didn't know how to use particle systems yet
oh... you must have an active camera (not "work cam", just for example cam1) press F12 (you hear a sound) Then :File - Export - poster - "..." (where you select the last file) and then choose the format (JPEG or PNG) and any size of your image. And finally export. A moment that will take, the image is in the folder where you used to have the path displayed.