Hi all,
so my first thing ever here.
Thank you everybody for the welcome:)
Well here is my second version. I will make the sky more interesting (so far not exact idea) and I want to open that a bit more so that the river is like going through the whole plan. Regarding the colors I will adjust them later too.

Hi Veronika 
I would check your perspective a bit. Some elements that you have added do not follow the same perspective as the 3D model.
Hi Veronika 
I would check your perspective a bit. Some elements that you have added do not follow the same perspective as the 3D model.