I'll offer a response to question number 1, about the ice wall.
The "ice wall" is an unofficial FE explanation about the configuration of the Flat Earth. The FES has not settled officially on where the The Edge of the Flat Earth exists, but using a 19th century Polar Azimuthal Equidistant Projection map (similar to the map in the UN flag), with Antarctica spread all around the rim of the map, some FEers have postulated that Antarctica, instead of being an island-like continent is spread thin around the rim of a circular Flat Earth, and that the icy coast that appears on much of Antarctica's shore is a barrier to further exploration - they even suppose that it is a barrier deliberately fortified with troops and garrisons to keep visitors and explorers out of Antarctica.
There are some problems to this notion. While those snowy cliffs appear in a lot of photographs, they are not continuous around Antarctica and they are not stable. There are considerable patches of the Antarctic shore where there are no snowy or icy bluff and the surface simply slopes down to the ocean, enabling the penguins to waddle right into the water, and other places where the snow or ice is only a few feet above the water so that the penguins can dive into and jump out of the water. Additionally, throughout the years, but especially in the summer months (at the South Pole, that's around December - February), enormous chunks of the shoreline cliffs break off and fall into the ocean. People who have been to Antarctica are very consistent - there are no troops there, no garrisons, no fortifications of the shorelines. The only thing that discourages explorers is common sense -- the climate is always very hostile, with no plants or game animals (apart from penguins and some other sea birds - none of them appetizing), and Antarctica being almost the size of North America, with only about two or three dozen occupied communities, mostly research stations, widely scattered, and ill-prepared to mount rescue missions or accommodate unexpected guests. Even so there are always at least 150 humans in Antarctica at the various research stations plus some photographers and explorers.
In any case there have been plenty of ships that have completely circumnavigated Antarctica, proving that it cannot be surrounding the rim of a flat planet. In fact, there are one or two ocean liners scheduling such circumnavigations every year (it takes about 6 weeks), with plenty of stops to annoy the penguins.