Craft 3 sticks
Craft 3 strings
Open a crafting table
Place 3 sticks in a diagonal line
Place 2 strings in the middle column, one above the other
Place 1 string in the right middle slot
Take the bow from the result slot
Craft arrows separately using 1 flint, 1 stick, and 1 feather for 4 arrows
Equip the bow and arrows in your hotbar
Right-click or hold use to draw and shoot the bow