If you want to play competitive Magic, this is the best Constructed format for you to start with, especially as you find plenty of Standard format qualifier events across both Magic Online and Magic Arena
Jhoira stumbled upon an ally, not just a good source of spare parts

Advanced Search Sets Random Syntax Abattoir Ghoul Accursed Horde Advanced Stitchwing Agent of Erebos Anathemancer Aphetto Vulture Apprentice Necromancer Archghoul of Thraben Arisen Gorgon Ashen Ghoul Ashen Reaper Attendant of Vraska Balduvian Dead Balduvian Fallen Baloth Null Black Oak of Odunos Bladestitched Skaab Bladewing the Risen Bladewing's Thrall Boneknitter Boris Devilboon Cabal Interrogator Carrion Feeder Carrion Howler Carrion Wurm Catapult Captain Catapult Fodder Cobbled Lancer Corpse Augur Corpse Connoisseur Corpse Harvester Corpse Knight Creakwood Ghoul Crypt Champion Curious Cadaver Dakmor Ghoul Dauthi Ghoul Dee Kay, Finder of the Lost Desiccated Naga Diregraf Captain Diregraf Ghoul Diver Skaab Dread Wight Dreadhorde Twins Dreadmalkin Dreadwing Dreg Mangler Drunau Corpse Trawler Dungeon Crawler Embalmed Ascendant Escaped Null Eternal Skylord Eternal Student Eternal Taskmaster Eternal of Harsh Truths Famished Ghoul Farbog Boneflinger Fatestitcher Fell Stinger Festerleech Fleshbag Marauder Forlorn Pseudamma Foulmire Knight Frightshroud Courier Ghoulsteed Ghoultree Gleaming Overseer Gloomdrifter Glowing One Gluttonous Zombie Gnawing Zombie Gorex, the Tombshell

Green has Auras that can give trample, making it much harder to block damage from a creature since it will be boosted by all the Auras attached to it
Bruno, Isabella, and an upgraded Mirabel are the standouts of the deck that seem like powerful cards to build upon if you want to expand your game