Hey there :3

Firstly, I'm going to talk a bit about your terrain. I like it a lot. You have a good diversity in the layering, and a really complex and original palette on the base of the plot - it would be nice if you incorporated this into all the areas of your grass, maybe just use a little less stonebrick in the higher areas though - could be like a pathway leading up the cliffs.
You could also mix some blocks into the stone - andesite/clay etc. I have to say I really like the atmosphere you've created on this plot, however.

Secondly, organics. You have some really nice trees on this plot! My only issue is the largest tree. It feels a bit too chubby, and without roots/lots of branches, it's just a bit out of place. Look up Pluto's God Tree tutorials for some hints, possibly? The leaves are also too obviously world edited - you can make out the spheres, and it just doesn't look too nice. I recommend a higher air percentage in the brush you used.
It may also be a nice idea to include another kind of organic on this plot. As you're aspirant, it would help you a lot with ranking - maybe a kind of animal, small or large, would be nice!

Lastly, structure. The structures you have are really nice, you just need some more of them! The house you've made; you could make some more houses similar to this, some smaller, different designs etc; but make like a small village or something, on the paved area you have.
You are also going to need at least one large structure just to show that you have the skills for large scale building.
The hot air balloon is really nice! I'd suggest making a couple more of them in the air cx

Good luck!
- Dutty :3