If they lack a powerful card to act as a centerpiece, starting with one of the games core mana types, forest, plains, swamp, island, and mountain, is the way to go
The Tinker Time March of the Machine Commander Deck set includes 1 ready-to-play Green-Blue-Red deck of 100 Magic cards (2 Traditional Foil Legendary cards, 98 nonfoil cards), 10 Planechase cards, 1 six-sided planar die, a 2-card Collector Booster Sample Pack (contains 1 Traditional Foil or nonfoil special treatment card of rarity Rare or higher and 1 Traditional Foil special treatment Common or Uncommon card), 1 Foil-Etched Display Commander (a thick cardstock copy of the commander card with foil etched into the cards border and art), 10 double-sided tokens, 1 deck box (can hold 100 sleeved cards), 1 Life Wheel, 1 strategy insert, and 1 reference card.
You can purchase the Mastery Pass, which acts like a premium tier, for 3,400 Gems
After all, if you cant get tons of value out of it immediately, your opponents each get to use it against you