Hi.
I figure as another hobbiest using Unreal to build something I can share some of my observations here with you.
Firstly, using Unreal and Blender is a good combination, it's actually what I'm using as well since my Maya subscription was expensive and it also turned out to be overkill for what I actually needed to do to make a game. So there's nothing wrong there.
However, I am curious as to how much experience you have with both as well as how many assets you are using in your project. I have not downloaded it, I'm only going off of the screenshots, but I imagine that's probably everything there is to see as well.
So here we go.
The artwork is all over the board. This usually tells me somebody is using a lot of asset packs. Maybe not though, and you actually built all the foliage and trees and rocks and textures and such, but I am fearing probably not.
When using assets, you may need to tweak them to your art style, or make sure you maintain that aspect. It looks like here you're going for an anime style... nothing seems to match that anime style except the main character.
If I had to guess, I'd say you either made the character, or the house the character is in. Provided how destroyed the UVs are on the house and how clean the character is, I have a feeling the character came from another source and you built the house parts in Blender and imported them and tried to apply textures in Unreal to the pieces.
This is fine, and if I'm wrong, that's fine too. The character is definitely the best part of the scenes, and looks significantly better than everything except for the photorealistic foliage/grass/rocks.
The terrain heightmap appears to go from 0 height to max height pretty much like a straight wall. But at least you're playing with it.
The scale between your house and your character appears to be way off. Your doors are like 12 feet tall doors or something and the doorknobs come up to the character's neck.
I think your project may need more time in the oven to cook. I'm not sure if going to Patreon immediately with this would be beneficial for you. I would add your other characters, tighten up the graphics in level 1 (fix the UVs, figure out what scale you are working at, etc). Figure out terrain, modify your foliage assets to match the style of your anime character, nix all the photorealistic stuff and modify it to be anime.
Definitely apply textures to anything that has the default Unreal texture.
Figure out how to improve your skeletal weight mapping in Blender.
Then try it again! Also don't indicate that you are totally new, and need a lot of stuff just to continue the project... that will give people the impression that you will not make enough money to ever complete the project and you probably don't have the skill to see it all the way to even a half-decent Beta version before you give up.
And finally, have fun! Don't do it for the money, do it because you love making games and want to learn more.