Hey there!

So first of all, I'm going to talk a bit about your terrain. You don't have much, from the looks of it. I can see you've mixed other blocks in with the grass to add more detail that way, and removed other grass blocks for the same reason, but it's not enough.
http://www.reverieinteractive.com/BetaGames/Minecraft_Clone/MCCloneTech1.PNG
This is a little more complex than what I was aiming for, but it shows you the layers well. Some can be jagged, some can be smooth. You can make as many as those amounts of layers, or you can only make like 3 or 4, it's completely up to you. That image is justa  good demonstration of how you could make natural looking flatter terrain to build structures on!
Or you could go more creative like this, however:
http://i.imgur.com/6JAFz6I.png
(Credit to Awesomeaki99 - Spark plot)

Secondly, your organics. Unfortunately, I don't see any on this plot.
So in case you weren’t aware, organics are basically things that are living, I guess – easiest way to put it. The most common organics are trees. Trees can be daunting at first to make, but they get easier. I used to suck, but then I met a guy who is well known in the community for making trees. His name is Plutouthere - https://www.youtube.com/channel/UCLUKySjsOfU9jcjYyFJWk2A/videos - there’s a link to his YouTube, where he has a couple tutorials on creating different kinds of trees. Check that out and see what you think.
Other organics that people tend to make can vary from people, animals, custom flowers. – I tend to see, on plots with high terrain, a lot of custom flowers.
Human organic: https://imgur.com/IkxAK0y
(Credit to TheDanishDreams)
Flower organic: https://imgur.com/0tklU0D
(Credit to Brad)
This is a really detailed example, as he’s created a large toadstool too. But it goes to show you that you can make anything living and it’ll work on a plot, as long as you give it purpose! ^.^

Lastly, your structure.
I think the palette you've used is a little too busy - the logs and nether don't really work well together, and the checkboarding on the roof is a big nono. The shape is also a little peculiar, and you lack depth on all of the walls.

I think in this case, it'd be best to start over. But use the things I've said to help you build your next plot! ^.^

Good luck!
- Dutty :3