Based on the torah, this is what the earth looks like

The firmament did open and leak. That's why we don't live as long as Methusaleh anymore, silly.

It's literally what happens in the story of Noah.

where does the air go?

Hmm. They had bellows, and knew what air is, so that's actually a period-appropriate question. Maybe Sheol can be pressurised, or maybe Noah just didn't notice the air getting thicker.

The rest is just a version of "what's outside the universe", which applies to real cosmology too.

Has the Waters above the firmament ocean a surface? And whats above that surface?

'How about we explore the area above that surface later?'

now

Now? No. Back then? Yes, the writing says so.

That is exactly why the "Floodgate" are here

gotem good