Is there anything wrong with the additions that I made to the flat earth map?
To make any meaningful progress in understanding how the physical world behaves, you have to make use of other people's observations. There is a limit to what one person can do. Even flat earth proponents make use of observations by other flat earth people.
It is difficult for one person to see the sun and moon from different places at the same time.
I checked with someone who lives in Sao Paulo (I edited my post for clarity).
However, I have seen sunrise and sunset numerous times and in many different places. And in every place, the sun rises from below the horizon climbing up in the sky, to its highest point about the middle of the day, then lower, and setting below the horizon. I have personally observed this in several different continents.
But how is it possible for the sun to appear to be near the horizon (i.e. close to the surface) while for someone else, it is directly overhead? it is possible on a globe, but not a flat earth.
There are some things that you can do on your own the demonstrate that the earth is a globe, not flat. These have been listed numerous times. The most common is that you can see further from a higher point than a lower point (provided your view is not obstructed). Ships go out of sight, with their lower decks going out of sight first and the mast last. An island out at sea or further along the cost, that is not visible at sea level but can be seen from a higher point (this has the advantage over a ship: it is not moving, so is not getting smaller. So, not being able to see the island is not because it has become too small). Sunrise, sunset.