Hi! As I can see, you're building very interesting project! I'd like to know more about your idea. Since I am a well experienced game developer, I am very good with modeling, 3d modeling, rendering, all in all, with Unity generally. I can help you realize this project. I've already built so many games, so working with terrain won't be a problem. Please message me so we can discuss more and make a great game! Regards, Andrija!