TheFrontRoomsGame/Assets/Scripts/LoadNextScene.cs

using UnityEngine;
using UnityEngine.SceneManagement;

public class LoadNextScene : MonoBehaviour
{
    public string nextSceneName; // the name of the next scene to load

    private void OnTriggerEnter(Collider other)
    {
        if (other.CompareTag("Player"))
        {
            SceneManager.LoadScene(nextSceneName); // load the next scene
        }
    }
}