cryptid nation booster box MetaZoo 1st Edition Pack I would say welcome to the world of MetaZoo MetaZoo - Cryptid Nation: Booster

But dont worry: in sealed play, the recommended Skill for Crowlers Deck is Ancient Fusion

You could choose to run the mission again, sure

Z-Zillion Tank X LIGHT Level 4 [ Machine / UnionEffect ] ATK 1500 DEF 1300 If this card is Special Summoned: You can equip 1 of your banished Level 4 LIGHT Machine monsters to this card as an Equip Spell, also you cannot Special Summon from the Extra Deck for the rest of this turn, except LIGHT monsters

There are tons of options out there, and new Trainer Cards are constantly being added to the game, as well as Pokey Tools, so it definitely takes time to figure out which Supporter Cards are best for your play style