In Minimal, you really can't do much, as it's just the development test "game". You need the *real* game content.
* Download the minetest_game distribution:
https://github.com/minetest/minetest_game/archive/master.zip* Unzip the file.
* Rename the resultant folder from "minetest_game-master" to just "minetest_game".
* Copy the resultant folder to your Minetest games directory. They'll be something similar to (but not necessarily exactly) one of these:
on Linux: /usr/local/share/minetest/games OR ~/.minetest/games
on Windows: C:\Documents and Settings\YOURNAME\minetest-0.4.9\games
* Start the program and create a new world, using "Minetest" as the game.
You can do this general procedure for any of the other sub-games that are found on these forums, e.g. Nodetopia, Nostalgia, my game, etc.