How to move cam up and down as well

Unity Engine
1 
 void Start()
    {
        actions = GetComponent<LionActions>();
        lionPlayerControls = GetComponent<LionPlayerControls>();
        Rigidbody = GetComponent<Rigidbody>();
       
    }

    // Update is called once per frame
    void Update()
    {
      
        var input = new Vector3(LeftJoystick.inputVector.x, 0, LeftJoystick.inputVector.y);
        var vel = Quaternion.AngleAxis(CameraAngleY+180, Vector3.up) * input * 20f;

        Rigidbody.velocity = new Vector3(vel.x, Rigidbody.velocity.y, vel.z)*-1;
        if (input.magnitude > 0)
        {
            transform.rotation = Quaternion.AngleAxis(CameraAngleY + Vector3.SignedAngle(Vector3.forward, input.normalized, Vector3.up), Vector3.up);
        }
        else
        {
            transform.rotation =Quaternion.Euler(0,transform.eulerAngles.y,0) ;
        }

   

       CameraAngleY += TouchField.TouchDist.x * CameraAngleSpeed;

       Camera.main.transform.position = transform.position + Quaternion.AngleAxis(CameraAngleY, Vector3.up) * new Vector3(0, 12, -15);
   
       Camera.main.transform.rotation = Quaternion.LookRotation(transform.position + Vector3.up * 2f - Camera.main.transform.position, Vector3.up);

     
    }
 
}

With touch Iim able to move my camera around player but only on a circle but ı want to be able to move camera up and down as well while cam looking at the player. How can I make it happen:

2

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