Construct a Dispenser.

Build some bookshelves to improve your enchantment table.

Kill a Pillager Captain.

Smelt wood trunks using charcoal to make more charcoal.

Complete your first song

Defeat Cleric Beast.

Cook and eat a pork chop.

Wear a full suit of Iron armour.

Construct one type of each tool (one pickaxe, one spade, one axe and one hoe).

Catch and cook a fish!

Throw diamonds at another player.

Construct a better pickaxe.

Use planks and sticks to make a pickaxe.