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http://www.youtube.com/user/onetwosc - OneTwo's tutorial channel; it's always easier to learn by watching others do stuff first.
http://eu.battle.net/sc2/de/game/maps-and-mods/ (german) - The first place to start out with mapping would be blizzards official tutorials, though.
Keep in mind that the editor changed a lot already.
Not really that hard but it will take some time to get to know the data editor. Look up some hero and unit creation tutorials and general triggering info on this page. :)
The wiki is "also" useful: http://www.sc2mapster.com/wiki/galaxy/main-page/
http://www.youtube.com/user/onetwosc - OneTwo's tutorial channel; it's always easier to learn by watching others do stuff first.
http://eu.battle.net/sc2/de/game/maps-and-mods/ (german) - The first place to start out with mapping would be blizzards official tutorials, though.
Keep in mind that the editor changed a lot already.
Not really that hard but it will take some time to get to know the data editor. Look up some hero and unit creation tutorials and general triggering info on this page. :)
The wiki is "also" useful: http://www.sc2mapster.com/wiki/galaxy/main-page/