Don't be sorry for asking mate. It helps all of us to learn more things.
One important thing that can say is to find where are your light sources and what are they. Are they interior or exterior? In your reference image you can see that the main lighting source is sun and it's reflected light from exterior objects. you haven't much interior light sources. So you have to made your main lighting with one light as sun.
Just tell me which renderer you use? Then I would can help more.