The best way I found stuff was by searching on Youtube. Most things are really outdated, but the editor actually didn't change a lot. Keep in mind the editor can look drastically different depending on how you have it set up. Some functions broke or were disabled etc but most of it all works and can be learned from. Most of the time you can just open Blizzards campaign maps to see how they did stuff and learn from that.
The best way I found stuff was by searching on Youtube. Most things are really outdated, but the editor actually didn't change a lot. Keep in mind the editor can look drastically different depending on how you have it set up. Some functions broke or were disabled etc but most of it all works and can be learned from. Most of the time you can just open Blizzards campaign maps to see how they did stuff and learn from that.
https://www.youtube.com/user/LazZProductionGaming
https://www.youtube.com/channel/UC2poAt8eAOa3f8JrmdVKuQA