Hey there, usually the coordinates command is F3 or Fn F3. Your Minecraft screen will then show coordinates and a bunch of locations, including Yx, 1.800, etc... A normal Minecraft creative world is normally 60,000 Kilometers which according to my calculations is bigger than Neptune. Hope this helped :). Any more urgent questions feel free to PM/DM me :). -Justin/Ghost
There is currently no way to see co-ordinates in survival. I don’t know the exact amount of chunks each server has but it they’re all relatively big. Since we don’t have co-ords just yet, it’s best to make homes in case you want to remember a specific place.