Moving A 2D Object Forward

I'm instantiating a bullet out of a gun and trying to move it forward in the direction/rotation is was instantiated as in a 2D space, but for some reason nothing works, the bullet doesn't move or it's moving in the wrong direction. I have tried using transform.forward and transform.right but non of them works. I will be extremely grateful for every help, this is my first time working with Unity and I'm still trying to learn the ropes.

BTW: This is a top down shooter kind of game.

This is how I instantiate the bullet:

 Instantiate(prefab, firingPoint.position, firingPoint.rotation);

And this is the bullet class:

 public class Bullet : MonoBehaviour
 {
     private Vector3 firingPoint;
 
     [SerializeField]
     float bulletSpeed = 2;
 
     [SerializeField]
     private float maxBulletDistance = 20;
 
     // Start is called before the first frame update
     void Start() {
 
         firingPoint = transform.position;
     }
 
     // Update is called once per frame
     void FixedUpdate() {
         MoveBullet();
 
         if (Vector3.Distance(firingPoint, transform.position) > maxBulletDistance) {
             Destroy(this.gameObject);
         }
     }
 
     void MoveBullet() {
 
         transform.position += transform.right * bulletSpeed * Time.deltaTime;
     }
 }