Gain the trust of an Ocelot.

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

Use Shears to obtain wool from a sheep.

Destroy a Ghast with a fireball.

Catch and cook a fish!

Smelt an iron ingot.

Use planks and sticks to make a hoe.

Attack and destroy a monster.

Use a Dried Kelp block as fuel in a furnace.

Punch a tree until the block of wood pops out.

Harvest some leather.

Construct a better pickaxe.

Open your inventory.