Force to the ball trajectory

Hello, I would like to add a force to my ball in my golf game, so if the player clicks the ball and holds a left mouse button, the power of the shot is growing, so is the trajectory. When the power reaches a maximum value the ball is shot immediately. I have a huge problem with it, and I'm stuck on it for a few days now. Maybe someone can help me? Code below: using System.Collections; using System.Collections.Generic; using UnityEngine;

 public class Ball : MonoBehaviour
 {
     internal Rigidbody2D ballRB;
     internal Vector3 startPos = Vector3.zero;
 
     int dotCount;
 
     internal bool isClicked = false;
     bool trajectoryVisible = false;
     bool paraboleReachedEndOfScreen = true;
 
     GameObject trajectoryDots;
     GameObject ballClick;
 
     //TrajectoryDots
     List<Transform> dots = new List<Transform>();
 
     //shot velocity
     Vector2 shotForce = Vector2.zero;
 
     public float startValShootingPower = 3f;
     public float shootingPower = 3f;
 
    
     float minBallPointerDist = 0.5f;
 
     float dotSeparation = 10f;
 
     float dotShift = 5f;
 
     Transform lastDotTransform;
 
     void Start()
     {
         startPos = transform.position;
         startValShootingPower = shootingPower;
 
         ballRB = GetComponent<Rigidbody2D>();
         trajectoryDots = GameObject.Find("Trajectory Dots");
         ballClick = transform.Find("Ball Click Area").gameObject;
 
         dotCount = trajectoryDots.transform.childCount;
         foreach (var dot in trajectoryDots.GetComponentsInChildren<Transform>())
         {
             dots.Add(dot);
         }
         dots.Remove(trajectoryDots.transform);
     }
 
     void Update()
     {
         foreach (var dot in dots)
         {
             if (dot.GetComponent<SpriteRenderer>().enabled)
             {
                 lastDotTransform = dot;
             }
         }
         paraboleReachedEndOfScreen = lastDotTransform.position.x <= -UsefulReferences.CameraViewFrustum.x / 2 || lastDotTransform.position.x >= UsefulReferences.CameraViewFrustum.x / 2;
 
         ballClick.SetActive(!isClicked);
 
         RaycastHit2D hit = Physics2D.Raycast(Camera.main.ScreenToWorldPoint(Input.mousePosition), Vector2.zero);
         if (Input.GetButtonDown("Fire1"))
         {
             if (hit.collider != null)
             {
                 //check if the mouse is hovering ball click area
                 if (hit.collider.transform.root.name == name)
                 {
                     trajectoryVisible = true;
                 }
             }
         }
 
         if ((Input.GetButtonUp("Fire1") || (paraboleReachedEndOfScreen && Input.GetButton("Fire1"))) && !isClicked && trajectoryVisible) //player released the mouse button or the parabole reached the end of the screen
         {
             trajectoryVisible = false;
             isClicked = true;
             UsefulReferences.ballScript.ballRB.constraints = RigidbodyConstraints2D.FreezeRotation;
             ballRB.velocity = shotForce;
             foreach (var dot in dots)
                 dot.transform.position = Vector3.zero;
             Invoke("GroundCheckAfterShot", 0.1f);
         }
 
         if (trajectoryVisible && !isClicked)
         {
             shotForce = (transform.position - Camera.main.ScreenToWorldPoint(Input.mousePosition)) * shootingPower;
             for (int i = 0; i < dotCount; i++) 
             {
                 dots[i].gameObject.SetActive(true);
 
                 dots[i].transform.position = new Vector2(transform.position.x + shotForce.x * Time.fixedDeltaTime * (dotSeparation * i + dotShift),
                     transform.position.y + shotForce.y * Time.fixedDeltaTime * (dotSeparation * i + dotShift) - (-Physics2D.gravity.y / 2f * Time.fixedDeltaTime * Time.fixedDeltaTime * (dotSeparation * i + dotShift) * (dotSeparation * i + dotShift)));
             }
         }
         else
         {
             foreach (var dot in dots)
             {
                 dot.gameObject.SetActive(false);
             }
         }
         //if the ball tried to fly out of the screen
         if (transform.position.y > UsefulReferences.CameraViewFrustum.y / 2 || transform.position.x > UsefulReferences.CameraViewFrustum.x / 2 || transform.position.x < -UsefulReferences.CameraViewFrustum.x / 2)
         {
             OnCollisionEnter2D(null);
         }
 
 
         if (isClicked && UsefulReferences.ballScript.ballRB.constraints == RigidbodyConstraints2D.FreezeAll)
         {
             UsefulReferences.gcsScript.gameOver = true;
         }
     }
 
     void OnTriggerEnter2D(Collider2D collision)
     {
         if (collision.tag == "Hole")
         {
             UsefulReferences.gcsScript.Score();
             ballRB.constraints = RigidbodyConstraints2D.FreezeAll;
         }
     }
 
     void OnCollisionEnter2D(Collision2D collision)
     {
         ballRB.constraints = RigidbodyConstraints2D.FreezeAll;
     }
 
     void GroundCheckAfterShot()
     {
         if (transform.position.y - startPos.y < 0.05f)
             ballRB.constraints = RigidbodyConstraints2D.FreezeAll;
     }
 }