I enjoyed the Jumpstart sets for what it was. I love the draft process, but the simplicity of "just smash two packs together and you have a ready-to-go 40-card deck" was very appealing, especially for new players.

So I wanted to try my hand at making my own Jumpstart format. The challenge of making a 20-card pack that is only half a deck, including lands, is a very fun puzzle.

Wheel picker for drafting/play-testing online: https://pickerwheel.com/pw?id=E7YgF

My friend and I went a little overboard with creating packs. So I am trying to cut it down to 10 packs in each color. I still have to cut Black and Green down.

W: 10
U: 10
B: 14
R: 10
G: 15

White

Artifact Onslaught - Grow your board with artifact creatures that get bigger the longer the game goes.
Colossal Plow - Vehicles
Doctor 2 - Incremental life gain for value.
Dogs - Woof. Woof.
Dungeoneering - Whenever you attack explore the dungeon.
Evershifting - Changlings and multi-creature type support.
Exalted - Exalted creatures and single creature swing support.
Gideon - Gideon tribal.
Valiant - Target mice to make your other mice bigger.
White Skies - Squadron Hawk and bird support.

Blue

Blue Skies - Flying creatures and flying support.
Fae Tricksters - Faeries and adventures.
Inventive - Artifacts and Artificers.
Mechtitan - Tssemble The Mechtitan.
Merfolk - Fish people tribal.
Mill - Mill them, or yourself.
Ninjas Blue - Ninjutsu in and gain value for combat damage.
Shark Attack - Shaaaaaarks.
Think Again - Drawing two cards in a turn.
Wizards - Wizards and control magic.

Black

Blood Price - Pay life for spells and value.
Boner Bois - Skeletons and grave loops.
Chthonian Nightmare - Energy and Reanimation.
Death Wish - "Half your life" tribal.
Discarding - Discard effects.
Gisa - Gisa-themed and zombies.
Liliana - Liliana-themed and zombies.
Myr - Myr tribal and combo.
Ninjas black - Ninjutsu in and gain value for combat damage
Reanimated - Reanimation
Smooth Criminals - Commit crimes, be gay.
The Price of Power - Strong cards that come with a price for their power.
Trading Post - Trading Post and support.
Unlucky Thirteen - The number 13 matters alt-win with Triskaidekaphobia.

Red

Chandra - Chandra themed and burn.
Devilish - Devils and burn.
Dragons - Dragons.
Lightning - Aggro, cards with "lightning" in their names
Lightning 2 - Aggro, Ball Lighing tribal.
Shamanism Fire Ceremony - Aggro Shamans and Elementals.
Spellcasting - Instants and sorceries, prowess.
Spicy - Burn, self-damage
Treasure - Treasure matters.
Wild Magic - Cast from exile and Chaos warp effects.

Green

Bears - Bears.
Consumption - Food tokens,
Eldrazi - Eldrazi sions and colorless creatures matter.
Enchantress - Auras and stompy.
Fertilizer - Dredge and Titania, Gaea Incarnate meld.
Fight Club - Fight opponents creatures.
Impostors - Changlings and tribal support.
Landfall - Landfall.
Multi-Headed - Ramp and Hyrdas.
Paleontology - Dinosaurs.
Squirrels - Squirrels.
Tree-Hugging - Treefolk.
Walls - Walls, defender
Wolves - Wolves.
Zoologist - Stompy, creature tokens.

Unblockable - Equipment and evasive creatures.
The Capitoline Triad - Affinity for artifacts and historic permanents in graveyard matters.
Twenty-Toed Toad - Frogs and card draw.
Grand Mechanisms - Contraption mechanic.
Dragon's Approach - Casting Dragon's Approach and cheating in a big dragon.
Miracles - Manipulate the top of the deck to cast miracles.
Doctor - Get your life total above starting for big buffs.
Conjurer - Cheat in creatures from the top of the deck.

https://cubecobra.com/content/article/605821e6099bcd10491f3eec#what-does-a-jumpstart-pack-look-like

https://mtg.fandom.com/wiki/Jumpstart
https://mtg.fandom.com/wiki/Jumpstart_2022
https://mtg.fandom.com/wiki/Foundations_Jumpstart
https://www.cubecobra.com/cube/list/qjg
https://www.cubecobra.com/cube/list/jsbattle