Hello everybody,
This is my first time that I’m working with Corona.
I attach here my final result, I’m glad to receive suggestions and critics.
Thank you 
Welcome aboard!
Yes, welcome aboard.
A few tips to make your scene a bit more correct/appealling:
-check the scale of all the items opposite each others. Now some are to small, others to large
-If you agree, let the sun shine through the windows, this will add some life to your render.
Good city choice for the background! 
don’t forget about perspective distortion, keeping the vertical line straight will makes your render do what it has to do.
is that a city? I thought the background was heaven 
In that case we develop Corona in heaven
Thanks to all