>Depending which information you research, you will quickly find there is not simply one flat Earth model or belief.
All everyone can agree on in the flat Earth community through real science testing, is that Earth is indeed flat. The general mainstream view of flat Earth is that it is a disc in space.
This is not what real flat Earthers believe however.
Most believe space only exists above, and that Earth is surrounded in an ice plane/realm. There may be other Earth ponds or there may not be. Some believe there is a dome/barrier above, some do not.
If you have ever looked up at the stars and planets in the sky with your own equipment, you will quickly come to the realization that NASA's CGI varies wildly to what you see in real life. For example, planets seem to be 'lights in the sky', not landable terra-firma as depicted by NASA.
A key point to flat Earth is that you cannot fly over 100 miles or so up. Every rocket or balloon to have tried, has stopped dead or blown up.
This is why all images of satellites in space, rockets in space, and space stations in space are CGI. Go check google images quickly, try find a real satellite image in space.
Only NASA's rockets seem to pass that 'barrier'. You will notice however that NASA rockets fly horizontal, never straight up after launch. It is claimed that NASA rockets simply fly out of view into restricted waters, and are recovered by NASA and then are faked as successful.
That's why the whole "It's not rocket science" joke came about. It was an inside joke for people in the know that realize rocket science is nonsense. Rockets can not fly over 100 miles up.
There is no evidence of any rocket flying over 100 miles up - only fake CGI. All images of Earth from space are CGI, photoshopped, and are generally created - same as images of space and similar.