Read the story now
I love the story concept and where you want to take it to the future. That is great! However, I would love for you to go back to the beginning to make it more impactful so the reader can be like...OMG...what's going to happen next. For example, when the asteroid hit in the first chapter, I felt that was a little rushed and I didn't get the details of what it looked like and how this impacted the characters emotionally/mentally. I wanted more details there, so I can feel for them. You know what I mean?
So here are some things to think about as you continue writing...What emotions do I want to pull from my readers? How is this impactful? How is life going to be different now?
I hope this helps! I can't wait to see how this develops in a masterpiece!