Animations get screwed up when I add OnAnimatorMove function

I'm using part of a code from one of the unity tutorials to figure out how to get my little orb to move with animations. The animations play fine before I add movement ie before I add OnAnimatorMove to set the movement for the rigidbody so I can move it around the scene with wsad. It'll play the idle in place and play the walk animation when I press wsad it just won't move, this is before adding OnAnimatorMove. Great right so I just have to add movement and it'll be fine. NOPE. Once I add the OnAnimatorMove function and call the rigidbody to move position, it will stop playing the idle animation at all and even though I can now move the orb around with wsad, its like, cycling through the walk animation in a weird fashion so that if I stop the orb it'll stop in the middle of the walk animation like a freeze frame. I'm unsure how to fix this and haven't been able to find a good answer online :T I'm very much a beginner at this. Help????

my code:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class PlayerMovement2 : MonoBehaviour
 {
 
     public float turnSpeed;
 
     Vector3 m_Movement;
     Animator m_Animator;
 
     Rigidbody m_Rigidbody;
 //---------------------------------
 //-----------------------------
     void Start()
     {
         m_Rigidbody = GetComponent<Rigidbody>();
         m_Animator = GetComponent<Animator>();
     }
  //----------------------------------
  //----------------------------------
     void Update()
     {
         float horizontal = Input.GetAxis("Horizontal");
         float vertical = Input.GetAxis("Vertical");
 
         m_Movement.Set(horizontal, 0f, vertical);
         m_Movement.Normalize();
 
         bool hasHorizontalInput = !Mathf.Approximately(horizontal, 0f);
         bool hasVerticalInput = !Mathf.Approximately(vertical, 0f);
         bool isWalking = hasHorizontalInput || hasVerticalInput;
         m_Animator.SetBool("IsWalking", isWalking);
 
         Vector3 desiredForward = Vector3.RotateTowards(transform.forward, m_Movement, turnSpeed * Time.deltaTime, 0f);
     }
     //-------------------------
     //-------------------
     void OnAnimatorMove()
     {
         m_Rigidbody.MovePosition(m_Rigidbody.position + m_Movement);
     }
 
 
 }