Jumping to the beat of Rayman Legends

I’ve recently started playing my unfinished copy of Rayman Legends and am faced with a reminder why I loved this game and also got fed

Picking my hero in Order and Chaos Duels

Do I go for a Human with +3 Armoured Minions or Elf with +2 Hero Mana Attack? Any difference between Human and Elf? What is a minion? Can I steal the moon?