Hi, this is my first render that seems to me good enough to be posted in a forum. Tell me what you think about it (don’t worry to hurt my feelings).
Cycles render engine with 1000 samples.
The photo of the backyard was found on the internet (I didn’t find the name of the legitimate owner).
Not perfect, but pretty nice job!
The roof looks a little high, maybe you should lower it to a visible range. Also the colors look a little flat and boring. Spruce it up a little! 
Thanks for the replies!!! The colours and the roof’s height were inspired by a real photo. Modern style I guess!!! However I think this was a good scene to practice with.