Trigger 2D (another gameObject)

Hello, I want to create a 2D game , I have a problem, I want to do a "OnTriggerEnter2D" where the gameObject attach is not take and take another. Exemple: the script is attached to the player, bullet enter in collision with another player. Sorry for my english, this is the code:

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

 public class Player : MonoBehaviour {
 
     [SerializeField]
     private Stat health;
 
     [SerializeField]
     private Stat energy;
 
     [SerializeField]
     private Stat gems;
 
     private void Awake()
     {
         health.Initialize();
         energy.Initialize();
         gems.Initialize();
 
 
     }
   
     void OnTriggerEnter2D (Collider2D bullet)
     {
         if (bullet.gameObject.tag == "Bullet")
         {
             health.CurrentVal -= 10;
             Debug.Log("works");
         }
         if (Input.GetKeyDown(KeyCode.S))
         {
             health.CurrentVal -= 10;
         }
 
         if (Input.GetKeyDown(KeyCode.A))
         {
             energy.CurrentVal += 10;
         }
         if (Input.GetKeyDown(KeyCode.E))
         {
             energy.CurrentVal -= 10;
         }
 
         if (Input.GetKeyDown(KeyCode.Q))
         {
             gems.CurrentVal += 10;
         }
         if (Input.GetKeyDown(KeyCode.D))
         {
             gems.CurrentVal -= 10;
         }
 
     }
 
 
 }