Hello, Lis! I love the colors in your bushes, and the fence has good perspective. I agree, shadows. Decide where the sun hits, and paint the building to show a light side and a darker, as well as ground shadows. Good job on your sky....but as time goes by, you may want to invest in some artist's quality paint...Lukas has some good paint at good prices...you will be absolutely amazed at how much your work will improve overnight with bright, highly pigmented color!
Now, the only disconcerting part that bothered me is the red on the roof...I'm thinking it may be a rusted corrugated tin roof? If so, it should be a more muted colors, like burnt sienna, burnt umber, or the like. (There are wonderful tutorials in the Learning Zone) about painting rust. And, if it is corrugated tin, there should be an indication of lines on the roof. (I have old corrugated tin roofs on my mind because I just looked them up on the net to get some "imprinted" images in my head for a possible old shack/cabin painting I am thinking about! Go figure!)
And, I'm looking forward to seeing more of your work!