You just stepped into my corner of the cosmos, where ancient myths meet orbital habitats and the aliens don't invade on cue... they ask for help. In my stories, the "ancient astronauts" are stranded travelers, not conquerors.
I write science fiction that treats technology like it matters and myths like they had happened. Why else would ancient cultures capture the story?
If this sounds like your kind of trouble, start with the novel — or sample a short story and see where the drift carries you.
Every story starts with a "what if" that won't let go. What if the so-called ancient astronauts weren't gods or conquerors, but travelers? What if the orbital habitats I read about as a kid were possible?
Advanced construction techniques would make those giant structures easier to build. Orbital and gravitational mechanics would matter as much as the cast of characters. And Earth-bound humans would respond differently than extraterrestrial travelers.
Mixing all of it into a story can be fun, and challenging. Chasing that balance where the science feels believable and the pages still turn late into the night.