Construct an Enchantment Table.

Play a music disc in a Jukebox.

Wear a full suit of Iron armour.

Acquire diamonds with your iron tools.

Harvest some leather.

Smelt an iron ingot.

Smelt wood trunks using charcoal to make more charcoal.

Attack and destroy a monster.

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

Use planks and sticks to make a sword.

Craft a workbench with four blocks of wooden planks.

Open your inventory.