Player Movement

i am creating a VR cardbaord game and i want the player to move forward with acc. and dodge objects by going left and right. i have already created the forward movement but i can`t create the left and right movement

here is the code i used

   public float acc = 0.5f;
     
     public float maxSpeed = 10.0f;
 
     public float speedSlowdown = 0.4f;
   [SerializeField]  private float speed = 3.5f;
 
   [SerializeField]  private float leftLimit = -5.0f;
 
   [SerializeField]  private float rightLimit = 5.0f;
 
     public float jumpingForce;
 
     public bool canJump = false;
     // Start is called before the first frame update
     void Start()
     {
         
     }
 
     // Update is called once per frame
     void Update()
     {
         PlayerMovement();
     }
 
     void PlayerMovement ()
     {
         // acc logic
         speed += acc * Time.deltaTime;
         if (speed > maxSpeed)
         {
             speed = maxSpeed;
         }
 
         float moveHorizontal = Input.GetAxisRaw("Horizontal") * speed * Time.deltaTime;
 
         Vector3 direction = new Vector3(transform.forward.x, moveHorizontal, transform.forward.z);
 
         transform.position += direction.normalized * speed * Time.deltaTime;
 
         // player stay in area
         if (transform.position.x < leftLimit)
         {
             transform.position = new Vector3(leftLimit, transform.position.y, transform.position.z);
         }
         else if (transform.position.x > rightLimit)
         {
             transform.position = new Vector3(rightLimit, transform.position.y, transform.position.z);
         }
 
         //player jump logic
         if (Input.GetButton("Fire1") && canJump)
         {
             canJump = false;
 
             GetComponent<Rigidbody>().AddForce(0, jumpingForce, 0);
         }
     }