first person spotlight look

For everyone following this question, I have figured it out. Here is the code I used:

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 
 public class mouseLook : MonoBehaviour
 {
     public float mouseSensitivity = 100f;
 
     public Transform playerBody;
 
     float xRotation = 0f;
 
     // Start is called before the first frame update
     void Start()
     {
         Cursor.lockState = CursorLockMode.Locked;
     }
 
     // Update is called once per frame
     void Update()
     {
         float mouseX = Input.GetAxis("Mouse X") * mouseSensitivity * Time.deltaTime;
         float mouseY = Input.GetAxis("Mouse Y") * mouseSensitivity * Time.deltaTime;
 
         xRotation -= mouseY;
         xRotation = Mathf.Clamp(xRotation, -90f, 90f);
 
 
         transform.localRotation = Quaternion.Euler(xRotation, 0f, 0f);
         playerBody.Rotate(Vector3.up * mouseX);
     }
 }