Changing 2D Player Sprite on Trigger using C#

Hi dear community,

i am still new to C# in unity. I am grateful for a solution to this little problem i have.

My objective is to change the Player's Sprite once they have collected a game item.

Please see my script below which does nothing to the player when she collides into her helmet.

What am I missing?

Thank you so much, Simone

using System.Collections; using System.Collections.Generic; using UnityEngine;

/// /// Makes the Player Walk Left & Right, Jump using animations /// public class GigiPlayerCtrl : MonoBehaviour { Rigidbody2D rb; public int speedBoost; public float jumpSpeed; // set this to 600 SpriteRenderer sr; Animator anim; bool isJumping; public Sprite gigiHelmet;

 // Start is called before the first frame update
 void Start()
 {
     rb = GetComponent<Rigidbody2D>();
     sr = GetComponent<SpriteRenderer>();
     anim = GetComponent<Animator>();

 }

 // Update is called once per frame
 void Update()
 {
     float playerSpeed = Input.GetAxisRaw("Horizontal"); // value will be negative 1, -1 or 0.
     playerSpeed *= speedBoost; // playerSpeed = playerSpeed * speedBoost
     if (playerSpeed != 0)
         MoveHorizontal(playerSpeed);
     else
         StopMoving();

     if (Input.GetButtonDown("Jump"))
         Jump();

     


 }
 void MoveHorizontal(float playerSpeed)
 {
     rb.velocity = new Vector2(playerSpeed, rb.velocity.y);

     if (playerSpeed < 0)
         sr.flipX = true;
     else if (playerSpeed > 0)
         sr.flipX = false;
     if (!isJumping)
         anim.SetInteger("State", 1);

 }

 // Update is called once per frame
 void StopMoving()
 {
     rb.velocity = new Vector2(0, rb.velocity.y);
     if (!isJumping)
         anim.SetInteger("State", 0);
 }
 void Jump()
 {
     isJumping = true;
     rb.AddForce(new Vector2(0, jumpSpeed)); // Make the player jump upwards ( the Y axis)
     anim.SetInteger("State", 2);
     AudioManager.instance.PlaySFX(1);
 }

 private void OnCollisionEnter2D(Collision2D other)
 {
     if (other.gameObject.CompareTag("Ground"))
     {
         isJumping = false;
     }

     else if (other.gameObject.CompareTag("Helmet"))
     {
         gameObject.GetComponent<SpriteRenderer>().sprite = gigiHelmet;

     }

 }

   

}