Get a position relative to a gameobject

Hello, trying to get a random position relative to a gameobject. As in how would I modify the following code to do this, I understand how this uses the whole gameworld to get a coordinate, however how would I make it so that the gameobject is essentially the 0,0,0 coordinate

     private Vector2 target;
 
     void Start()
     {
         target = new Vector3(Random.Range(-69.0f, 100.0f), Random.Range(-420.0f, 100.0f), Random.Range(-420.0f, 100.0f));
     }
 
 
 
     void Update()
     {
         transform.position = Vector2.MoveTowards(transform.position, target, 500f * Time.deltaTime);
     }