Help Spawn Bullet 2D

Please help me edit these code to make bullets fly straight up, and when bullets fly off the screen, they are destroyed.

PlayerController.cs

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class PlayerController : MonoBehaviour
 {
     private Vector3 destination;
     private bool isShooting;
 
     [SerializeField]
     private float fireRate = 0.2f;
     [SerializeField]
     private GameObject bulletPrefab;
     [SerializeField]
     private Transform bulletSpawnPoint;
 
     public AudioSource shootSFX;
 
     // Start is called before the first frame update
     void Start()
     {
         
     }
 
     // Update is called once per frame
     void Update()
     {
         
     }
 
     private void FixedUpdate()
     {
         if (Input.GetMouseButton(0))
         {
             destination = Camera.main.ScreenToWorldPoint(Input.mousePosition);
             transform.position = Vector3.Lerp(transform.position, new Vector3(destination.x, destination.y, transform.position.z), 0.1f);
         }
 
         if (isShooting)
         {
             StartCoroutine(Shoot());
         }
     }
 
     IEnumerator Shoot()
     {
         // Initialize a bullet at the position of bulletSpawnPoint, the angle (Quaternion) defaults to the angle of bulletPrefab
         Instantiate(bulletPrefab, bulletSpawnPoint.position, Quaternion.identity);
         // Make sound
         shootSFX.Play();
         // After spawning bullets, will stop firing for #fireRate
         isShooting = false;
         yield return new WaitForSeconds(fireRate);
         // After waiting enough time #fireRate will start firing again
         isShooting = true;
     }
 }

Bullet.cs

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class Bullet : MonoBehaviour
 {
     [SerializeField]
     private float bulletSpeed;
     [SerializeField]
     private float bulletDamage;
 
     // Start is called before the first frame update
     void Start()
     {
         GetComponent<Rigidbody2D>().AddForce(Vector2.up * bulletSpeed);
     }
 
     // Update is called once per frame
     void Update()
     {
         
     }
 
     private void OnTriggerEnter2D(Collider2D collision)
     {
         if (collision.CompareTag("Block"))
         {
             Debug.Log("OnTriggerEnter2D with Block");
             collision.SendMessageUpwards("OnDamaged", bulletDamage);
         }
 
         if (!collision.CompareTag("Bullet"))
         {
             Destroy(gameObject);
         }
     }
 }