Definitely misinterpretation. The Hebrew word that's often translated as "firmament" simply means "expanse", and can refer to an ocean, a field, a desert, etc. In fact, in Genesis 1: 20, the Hebrew language describes birds flying *over* the firmament. If the firmament is the expanse of land and/or water beneath them, this makes perfect sense, but if it's a dome above them, then it makes no sense at all.

This video explains it better than I can:

https://www.youtube.com/live/aT0z0TIoy94

It's also worth pointing out that I believe in an infinite God, the Creator of an infinite number of stars, planets, and galaxies. Such a Being is definitely worth my devotion. But a being that only created this little dome, and then makes us think we're seeing a sun, moon, local planets, and distant stars that all have the appearance and behavior of spheres but are actually just projections on the little dome, sounds like not only a finite being but a deceiver, and not a god at all, but much more like one of the false "gods" the Bible repeatedly warns against. But that's just my 2 sats.