Write a metaphor that may describe the following situation.
A young boy had set out on a journey for the first time.
A young boy setting out on a journey for the first time is like a bird taking its first flight, both filled with excitement and uncertainty, embarking on a new adventure filled with endless possibilities.
Complete the following task based on the instruction and optional input provided.### Instruction:
Write a metaphor that may describe the following situation.

### Input:
A young boy had set out on a journey for the first time.

### Output:
A young boy setting out on a journey for the first time is like a bird taking its first flight, both filled with excitement and uncertainty, embarking on a new adventure filled with endless possibilities.