Having trouble inserting character into existing third person character controller - How can I script it so that I can move in directions?

Im trying to put my modeled character into the 3rd person controller + Fly. character controller.

My model has stationary looping animations for walk and run, as in only the motion is animated but not the movement in world space itself so when I replaced the movement animations in the controller, my model does not move. I then tried to find out how to fix this and found the scripting root motion page and it works in that I can now move my character but it only moves in a straight line no matter what direction I input.

If anyone can help me find out how to script the movement so that I can move in all directions not just straight I would greatly appreciate it, because I have tried and couldn't make it work.

This is the relevant parts of the 3rd person movement script.

 // Deal with the basic player movement
 void MovementManagement(float horizontal, float vertical)
     {
         // On ground, obey gravity.
         if (behaviourManager.IsGrounded())
             behaviourManager.GetRigidBody.useGravity = true;
 
         // Call function that deals with player orientation.
         Rotating(horizontal, vertical);
 
         // Set proper speed.
         Vector2 dir = new Vector2(horizontal, vertical);
         speed = Vector2.ClampMagnitude(dir, 1f).magnitude;
         // This is for PC only, gamepads control speed via analog stick.
         speedSeeker += Input.GetAxis("Mouse ScrollWheel");
         speedSeeker = Mathf.Clamp(speedSeeker, walkSpeed, runSpeed);
         speed *= speedSeeker;
         if (behaviourManager.isSprinting())
         {
             speed = sprintSpeed;
         }
 
         behaviourManager.GetAnim.SetFloat(speedFloat, speed, speedDampTime, Time.deltaTime);
     }
 
     // Rotate the player to match correct orientation, according to camera and key pressed.
     Vector3 Rotating(float horizontal, float vertical)
     {
         // Get camera forward direction, without vertical component.
         Vector3 forward = behaviourManager.playerCamera.TransformDirection(Vector3.forward);
 
         // Player is moving on ground, Y component of camera facing is not relevant.
         forward.y = 0.0f;
         forward = forward.normalized;
 
         // Calculate target direction based on camera forward and direction key.
         Vector3 right = new Vector3(forward.z, 0, -forward.x);
         Vector3 targetDirection;
         targetDirection = forward * vertical + right * horizontal;
 
         // Lerp current direction to calculated target direction.
         if((behaviourManager.IsMoving() && targetDirection != Vector3.zero))
         {
             Quaternion targetRotation = Quaternion.LookRotation (targetDirection);
 
             Quaternion newRotation = Quaternion.Slerp(behaviourManager.GetRigidBody.rotation, targetRotation, behaviourManager.turnSmoothing);
             behaviourManager.GetRigidBody.MoveRotation (newRotation);
             behaviourManager.SetLastDirection(targetDirection);
         }
         // If idle, Ignore current camera facing and consider last moving direction.
         if(!(Mathf.Abs(horizontal) > 0.9 || Mathf.Abs(vertical) > 0.9))
         {
             behaviourManager.Repositioning();
         }
 
         return targetDirection;
     }

and this is the root motion script that I inserted in

  void OnAnimatorMove()
     {
             Animator animator = GetComponent<Animator>(); 
                               
             if (animator)
             {
      Vector3 newPosition = transform.position;
                newPosition.z += animator.GetFloat("Runspeed") * Time.deltaTime; 
      transform.position = newPosition;
             }
     }

Both of those in conjunction resulted in my character only being able to move forward in a straight line no matter if I pressed forward, back, left, or right. Thanks in advance.