Collect 3 sticks
Collect 3 string
Open a crafting table
Place 3 sticks in a diagonal line from bottom-left to top-right
Place 3 string in the remaining left-middle, top-right, and middle-right slots
Take the bow from the result slot
Collect arrows by crafting them with 1 flint, 1 stick, and 1 feather
Open a crafting table
Place 1 flint in the top slot
Place 1 stick in the middle slot
Place 1 feather in the bottom slot
Take the arrows from the result slot