Open the Crafting Table
Place 3 Sticks in a diagonal line from top-left to bottom-right
Place 3 Strings in the right column, one in each row
Take the Bow from the result box
To make Arrows, place 1 Flint in the top row center
Place 1 Stick in the middle row center
Place 1 Feather in the bottom row center
Take the Arrows from the result box
Equip the Bow
Put Arrows in your inventory or off-hand
Use the Bow to shoot the Arrows