If you want to start cooperative survival in an open world with your friends, then the Wimborne map will be an excellent choice for this. It implements a well-thought-out village at the starting location. There are many free furnished houses, a finished farm, training grounds and much more. Such a settlement will be an excellent starting point for exploring a vast world and is well suited for a small server.
How to install Wimborne map
Download the archive.
Unzip its contents into the ‘saves’ folder located in the game folder.
Launch Minecraft, start a game, choosing the world Wimborne.