Dominate Another World Starting with Gunpowder

In a different world with magic, we face a remote border that is so barren that there are almost no magical beasts and training resources, and there are thousands of beastmen harassing us. How should Chen Ying, who was called enfeoffment but was actually exiled, start from scratch with a system that was not highly intelligent, and in most cases rely on her own wisdom to conquer the world? [(Focus on personal ability), (Farming), (Firepower first)]