Need Help with MousePos and dashing

I'm a new unity user making a simple dash ability for my game. I'd like the player to dash towards the mouse on left click. I want to AddForce for the dash. However, all of the tutorials on this i've found either just dash in the direction of the last key pressed, or don't use force. I haven't tried anything because i'm really unfamiliar in this area. how would I go about doing this? if someone could explain how this works to me so I know how to do this in the future that would be great. Thanks! I do have this code I found on this website for a dash ability.

 public class DashAbility : MonoBehaviour {
      
      public DashState dashState;
      public float dashTimer;
      public float maxDash = 20f;
  
      public Vector2 savedVelocity;
      
      void Update () 
      {
          switch (dashState) 
          {
          case DashState.Ready:
              var isDashKeyDown = Input.GetKeyDown (KeyCode.LeftShift);
              if(isDashKeyDown)
              {
                  savedVelocity = rigidbody.velocity;
                  rigidbody.velocity =  new Vector2(rigidbody.velocity.x * 3f, rigidbody.velocity.y);
                  dashState = DashState.Dashing;
              }
              break;
          case DashState.Dashing:
              dashTimer += Time.deltaTime * 3;
              if(dashTimer >= maxDash)
              {
                  dashTimer = maxDash;
                  rigidbody.velocity = savedVelocity;
                  dashState = DashState.Cooldown;
              }
              break;
          case DashState.Cooldown:
              dashTimer -= Time.deltaTime;
              if(dashTimer <= 0)
              {
                  dashTimer = 0;
                  dashState = DashState.Ready;
              }
              break;
          }
      }
  }
  
  public enum DashState 
  {
      Ready,
      Dashing,
      Cooldown
  }

If anyone could maybe help modify it to work for this that would also be epic. (the page where I got the code is here.)