Yeah, it's interesting. I can't tell you what to put in your writing, that's what you are to do. When I write, I think of what the entire thing is going to be about and when things are going to happen, maybe add foreshadowing to help the reader have little hints on what's going to happen. Use your creativity to think things through and go back and edit things if you have to. Make the story flow. Think about what the main thing is. You could make a plot twist at the ending like the entire thing was a dream, or she/he wasn't just human. Maybe he/she's abused or maybe he/she's just a regular boy/girl and protect him/her from aliens or fallen angels. It's 2020, make futureistic things, but don't over do it. Use your imagination to get the story done, and if you have a writers block (which all of us get sooner or later) put it on hold and/or try and think of something epic or tragic to happen instead of the usual (like make the main character die, and then something happens and you realize he/she's not dead, or the girl and guy get together again, or change the point of view so you get both sides of the story) All I'm trying to say is that, use your imagination to get the story flowing, hook the readers (which you already did with the intro), and finish with a good ending. (bring people to tears, make the reader be amazed, make them be like oh my lord, or leave a clift hanger hinting that you may never know what's going to happen next or you're going to make a sequel)
I think with the futureistic look and angels, heavens, exc, you have a good start. You just have to finish. :)
(I hope that helped)