Hi, My IGN is BananaTheBob and I'll be reviewing your plot today! :D
When reviewing initiate plots we look for three things: Structure, Terrain, and trees/organics.

Structure:
The structure has to have at least one layer of depth. This means that there should be a frame for the house and the wall should be one block back so there are two layers. Then you're supposed to detail the inner layer with things such as slabs, fence, stairs, etc. However, be sure that you don't over detail and take up the entire wall. The roof windows and vines shouldn't cover the entire house in hopes that it looks like depth.

Suggestions:
The structure is nice but the roof color doesn't go well with the rest of it, and the quartz doesn't either. It would be wise to add another structure with walls to show that you know how to detail them.

Terrain:
Basic terrain is a requirement, and more extreme terrain would help you rank up. When building small terrain you have to make sure that it flows, and there aren't any edges that would make it look unnatural. There should be a good amount of space (between 2-6 [give or take a few]) between the ending and beginning of a new layer of terrain. (do /plot visit BananaTheBob 11 and look at the bottom to see an example of this). Difficult terrain such as cliffs of mountains are easy, they just take some practice. There are different methods and you'll eventually find what suits you. The easiest method is building the template (the basic shape that you want the terrain to be, no detail/doesn't look natural). Then you detail it, there are other methods that will make it look more natural, but if you're beginner that is the best option. (do /plot visit BananaTheBob 11 and look at the second/top layer for examples of cliffs. The method used is a little bit more difficult but you can ask me to demonstrate it if I'm not busy! :D

Suggestions:
The terrain looks unnatural because there are to many stairs and cobble walls. It makes it look to busy and like it's a collage of stone blocks.

Trees/Organics:
Organics such as people and animals are NOT, I REPEAT NOT required to rank up, but custom trees are. Trees will help you rank up, but not bonemealed trees. The custom tree shouldn't be the same size and shape a bonemealed one or it defeats the purpose of building your own. Start with the trunk and then add branches (number of branches depends on the size of the trunk and tree, so do the leaves). The leaves should be fluffy and not like they are taped onto the branches. Remember, the trunk should not be straight up, and should have some shape to it (but not look like it's about to tip over). The leaves and branches size should be relative to the trunk. This means that the leaves shouldn't be to big for the trunk and the trunk shouldn't be to big for the leaves.

Suggestions:
Custom trees are required to rank up. Read above for information on how to get started :D ^

There's a lot of empty space in the water that could use some filling!

Good luck!