Humanity Got Lost: My Brother's Looking for Home, and I'm Looking for Him

Ye Ning was born on a planet whose ecosystem was on the verge of collapse. The people there called it Earth. They built a huge "ship" and left their home planet, but encountered a cosmic storm that carried them far away. So they began searching for their home planet... I'm not good at writing blurbs, so please read the story itself. This is my first time writing, and my prose may not be very good, so please bear with me. I still have to go to school, so updates will be irregular. Please understand, and thank you.