Trying To Find Mouse Position On Tap

I'm trying to see if I can move a trigger to where the characters taps/clicks. I've done lots of researching and looked over lots of other people who had a similar-ish problem, which eventually lead me to this; but the object now doesn't move at all when I click.

 public int TapDamage = 10;
 Vector3 StartPos;
 Vector3 p = new Vector3();
 Camera c = Camera.main;
 Event e = Event.current;
 Vector2 mousePos = new Vector2();


 private void Start()
 {
     StartPos = gameObject.transform.position;
 }

 void MovingClickBox()
 {


     if (Input.GetMouseButtonDown(0) == true)
     {
         mousePos = Input.mousePosition;

         mousePos.x = e.mousePosition.x;
         mousePos.y = c.pixelHeight - e.mousePosition.y;

         p = c.ScreenToWorldPoint(new Vector3(mousePos.x, mousePos.y, c.nearClipPlane));

         gameObject.transform.position = mousePos;


     }
  
 }


 private void FixedUpdate()
 {
     MovingClickBox();

     

 }