Hey there :3

Firstly, I'm going to start with your terrain. You don't have any, and it's very clear to see. Starting with terrain is always advised, especially when you are without world edit. It means you can determine what you're going to build around the terrain. In my opinion, I always get structure ideas from the terrain I make. It may help you in this case :3

Secondly, you lack organics. Organics can improve a plot by adding an element of realism and atmosphere. Organics can include simple things like trees, flowers etc, all hand made of course, which can enhance a plot in a very simple way. Or, if you want to do something bigger, you can make an animal, a larger plant, a person etc, a living thing, basically. You can even make that the main focus of your plot :3

Lastly, your structure. I think the detailing is too basic, along with the palette and design. Using all oak plank isn't advised, and a straight line upwards isn't appropriate structural design. I'd restart your plot if I were you and follow the tips I've given you.

Good luck!
- Dutty :3