One issue with this piece that's exacerbated in the preview image: the reds are so, so dark relative to all the other colors here that it's hard to tell what the actual subject of the piece is supposed to be. It's not some random roofs right?
the color usage is great! such a nice palette. I think my favorite part of this is the grass <3
as for clouds, I always suggest imagining each cloud as a small cluster of spheres. it simplifies the shading to spheres, and once you are comfortable with that you can start to deform them! I think you did just fine :)
I agree with you, I didn't give much thought to the reds. But it's totally supposed to be some random roofs tho