While there are plenty of helpful theme deck lists you can acquire, building decks from scratch is a whole new level of fun
If you don't have a bounceland like Carnarium, you can improvise one using Cloudstone CurioCloudstone Curio, Trench BehemothTrench Behemoth, or Storm CauldronStorm Cauldron
A weekly event series available throughout the season, featuring Booster Draft or Sealed Deck format play
I think this one is more meta dependent if you want some big damage over time with other cards like Mayhem Devil, but its a fine card for many a deck at a more casual table

Commander (1) Creature (23) Assaultron Dominator Brotherhood Scribe Curie, Emergent Intelligence Loyal Apprentice Red Death, Shipwrecker Steel Overseer James, Wandering Dad Nick Valentine, Private Eye Paladin Danse, Steel Maverick Rex, Cyber-Hound Synth Eradicator Arcade Gannon Elder Owyn Lyons Robobrain War Mind Solemn Simulacrum Whirler Rogue Liberty Prime, Recharged Sentinel Sarah Lyons Sentry Bot Shaun, Father of Synths Synth Infiltrator The Motherlode, Excavator Behemoth of Vault 0 Instant (8) Dispatch Swords to Plowshares Electrosiphon Thirst for Knowledge Crush Contraband Glimmer of Genius Unexpected Windfall Bottle-Cap Blast Sorcery (4) One with the Machine Austere Command Open the Vaults Wake the Past Enchantment (5) Overencumbered Nerd Rage Mechanized Production Vault 112: Sadistic Simulation Vault 13: Dweller's Journey Artifact (22) Everflowing Chalice Sol Ring Wayfarer's Bauble Arcane Signet Automated Assembly Line Expert-Level Safe Lightning Greaves Mind Stone Plasma Caster T-45 Power Armor Talisman of Conviction Talisman of Creativity Talisman of Progress Thought Vessel Brotherhood Vertibird C.A.M.P

In general, apart from the cards we've been talking about, the mythics of Iconic Masters should be ignored if the goal is to build a Modern collection