N4x

Kill a Shulker that spawns when a respawned Ender Dragon dies

Get a pair of Elytra from a flying Endermite

Enter the End

Start a Wheat farm

Kill a Spider for its String

Buy a Moss Block from the Wandering Trader

Make an Iron Farm and get a full stack of Iron Ingots

Get some Redstone from a Witch

Strike some Pigs with Lightning to convert them to Zombified Piglins, then kill them for Gold

Enter the Nether

Buy all types of tall flowers from the Wandering Trader

Obtain Lava as a Gift from a Toolsmith

Build a Cobblestone generator

Get a Silk Touch tool so you can move Grass Blocks easier

Craft Bone Meal from Bones to grow trees faster

Get a Water Bucket from a Full Cauldron

Make your first of many trades with a Wandering Trader

Trade for Emeralds

Kill a Drowned for Copper

Cure a Zombie Villager using a Weakness Potion thrown by a Witch

Crawl and place blocks on the bottom of top-side Trapdoors to build downward

Craft a Golden Apple

Craft Bone Blocks from Bone Meal for Extra Fireproof Blocks

Make a Bed of the right color

Kill a Witch

Kill the first of many Zombies

Kill Zombies to get Iron

Kill a Skeleton for its Bones

Get a Carrot or Potato from a Zombie and start a farm for breeding Pigs

Mobs spawn faster lower in the world

Get your first Sapling to grow another tree

Get your first Log

Everything from Nothing