Restart the scene without changing the scoreboard

I was making a pong-like game and I have reached the point where I have to reset the ball to its original position every time a player scores in the opponent's goal. I have seen that you can use the SceneManager to reload the initial scene although this also resets the score to its original state.

I have also thought, instead of reloading the main scene, to simply reload a ball, using the Instantiate function. using System.Collections; using System.Collections.Generic; using UnityEngine;

 public class MovPelota : MonoBehaviour
 {
     // Start is called before the first frame update
     public float ballspeed,movx,movy;
     float maximoX, maximoY;
     float minimoX, minimoY;
     float objectWidth, objectHeight;
     public Vector2 screenBounds;
     public Camera MainCamera;
     public event System.Action PuntoEnemigo;
     public event System.Action PuntoJugador;
     public Vector3 originalpos = new Vector3(gameObject.transform.position.x,gameObject.transform.position.y,gameObject.transform.position.z);//Original Position of the Ball
     
     void Start()
     {
        
         screenBounds = MainCamera.ScreenToWorldPoint(new Vector3(Screen.width, Screen.height, MainCamera.transform.position.z));
         
         ballspeed = 5f;
         objectWidth = transform.GetComponent<Renderer>().bounds.extents.x; 
         objectHeight = transform.GetComponent<Renderer>().bounds.extents.y; 
 
         //Maximo y minimo de las pantallas
         maximoX = screenBounds.x * -1 + objectWidth;
         minimoX = screenBounds.x - objectWidth;
         maximoY = screenBounds.y * -1 + objectHeight;
         minimoY = screenBounds.y - objectHeight;
 
         //Movimiento de la pelota.
         movx = -.5f;
         movy = -.5f;
     }
 
     // Update is called once per frame
     void Update()
     {
         Vector3 viewPos = transform.position;
         
         Puntuaciones(viewPos);
         if (viewPos.y <= maximoY)
         {
             viewPos.y = ((float)(maximoY - 0.05f));
             movy *= -1;
         }
         if (viewPos.y >= minimoY)
         {
             viewPos.y = ((float)(minimoY + 0.05f));
             movy *= -1;
         }
             transform.Translate(movx * Time.deltaTime * ballspeed, movy * Time.deltaTime * ballspeed, 0f);
         
 
     }
     void OnTriggerEnter2D(Collider2D trigger)
     {
         Vector3 viewPos = transform.position;
         if (trigger.tag == "jugador")
         {
             viewPos.x = ((float)(maximoX - 0.05f));
             movx *= -1;
             
         }
 
     }
     void Puntuaciones(Vector3 PosicionNueva)//Function for points
     {
         if (PosicionNueva.x <= maximoX )
         { 
             if(PuntoEnemigo != null)
             {
                 PuntoEnemigo();
                 
                
              }
              Instantiate(pelota,originalpos);//pelota is a game object in the scene
 
              
         }
         if (PosicionNueva.x >= minimoX)
         {
             if(PuntoJugador != null)
             {
                 PuntoJugador();
                
             }
             Instantiate(pelota,originalpos);
         }
     }
 }

I'm new to unity and c#, so I don't understand when it says that "ball" doesn't exist in this context, I don't know if it's because it has to be declared as a game object even though it exists in the main scene.

I wanted to know how to do what I am trying to do well or if there is another way to do it more efficiently. (17,78)Los errores que me aparecen son : Error CS0236: A field initializer cannot reference the non-static field, method, or property 'Component.gameObject' (17,110): error CS0236: A field initializer cannot reference the non-static field, method, or property 'Component.gameObject' (80,26): error CS0103: The name 'pelota' does not exist in the current context (90,25): error CS0103: The name 'pelota' does not exist in the current context