Overall, I think you achieved your goal very well! The balance between the light, green grass, white house and blue sky works very well.

The weak side are the materials… You really need to dive into the concrete, floor tiles and metal frames to take this to the next level.

Keep it going

Looking great so far, I agree with Ronen bit more work on the materials are necessary, add some dirt maps, or add some bits of imperfections in post-production. The water pool looks so calm almost like glass plane. I definitely would try horizontal composition, giving more air to the left side, where the pool is. I would also try to work the illumination in the interior, or adding small details. Great work

I guess @ronen and @db.inforender had pretty much covered most of it but I personally would improve the composition a little more because I am constantly finding myself looking at the long plain grass patch on the bottom of the image. Otherwise good job!

Nice arch, the mood looks very natural and could be really interesting to see more lighting concepts and moods from the same project