Hello!

I'm a student taking an Astro-Philosophy class within my university, and our topic this month is on this community: Flat Earth Society.
I should note before I go further: I do not intend nor encourage the harassment of Flat Earth Believers, nor is my topic this month meant in any way to dehumanize or trivialize the concept. I've always been interested and I was looking for a few questions that I couldn't find answers to.
1. Are there any mostly-unanimous maps, diagrams, or concepts regarding how the Earth looks if it's not a sphere? If no, is there a specific reason as to why (apart from the obvious cost and labor that goes into map charting)? Depending on the location of continents (like if they were close by to the edge), would I be able to see the "edge" of the Flat Earth? If not, why?
2. What is the explanation offered for the lack of visuals beyond the sea? I've seen this question a lot. I know the Round Earth explanation is that the Horizon covers the rest of the Earth from our view. What is the Flat Explanation. I've seen a lot of edited images on both sides of the debate (or rather, significantly conflicting images. Even with images on their own sides). I am looking for honesty here, I am being graded after all!
3. I've seen some things about flight trajectories, and it is true that flights do tend to be shorter when on a curvature. Is there an explanation for this within Flat Earth Theory? This seems like something independent from conspiracy, because a flight travel company would try to go the shortest distance possible.
4. On the topic of conspiracy, and with as much respect as you can hold: do you believe more in the idea of a Flat Earth, or do you believe more in the disbelief of a Round Earth? The two of these are the most popular and prominent, but is it more about the disbelief in a round earth? Could the earth be anything but round, by definition?
Thank you again for anyone who reads this. I hope to check back and see some responses!