Hi the problem is that you just fell for the mainstream flat earth model. This model is bollocks like the globe!
There is no prove for curvature and no real footage of earth from space.
Horizon stays always on eye level and sea level is flat like the path of planes over the oceans. They fly level flat on the flat plane
BUT the model is wrong!!

I am a flat earther since 2014 and it took me from 2013 to research if there is any evidence for the heliocentric globe model. There isnt!

Watch:
WHY the official FLAT EARTH model is WRONG, and WHY it matters...

And you can check my videos on the flat earth subject:
HORIZON ALWAYS EYE LEVEL PROVES EARTH MUST BE FLAT. Enhanced horizon on flat earth

Dont believe. Think for your self
doctortruth