To avoid nil player error when pasting commands from https://wiki.factorio.com/Console:
Keep "local player = ..." without quotes
Omit "/c"
Replace all instances of "game.player." with "player."

Unlike console commands, these scripts won't disable modded achievements.
I don't know Lua, so please correct me if any of this is wrong :)

It seems like you missed some context.
You want to describe some main parts of the mod for people who have a little/none experience with lua, right?

The context was that I didn't know Lua and wanted to simply copy paste console commands from the wiki. I kept getting a nil player error and after a lot of guessing that ^^ finally worked. I don't understand why, but it's a simple edit so I thought I'd share it here. The observation about modded achievements was from loading a new freeplay, starting a script, and not getting the console cheat warning. That sums up all I know about Lua and this mod combined so far.