Find Game Photon Server Unity

I'm doing a half turn based half realtime game, for that, I'm using realtime. But i'm not using PUN, I done a server on my self machine. What I want to do now: The player click on a button "Find Game" and the server will list all players searching for a game, and connect 8 players on a room, and start automacally the game, for easy understand, its like Conter Strike Global Operation, or Dota 2 system of Match Making.

I just found the option for create rooms, and join a random room, but I want to "Jump this Step" of a player enter on a room and wait all click "Ready" to finally start the game, the Idea is: who's searching a game, automacally join in it when the number of players are reached.

Any Idea how to do that ?

I done this try, but I want to enter game if the max player limit is reached

 using UnityEngine;
 using System.Collections;
 
 public class NetworkingConnector : MonoBehaviour 
 {
     public string gameVersion = "";
     // Use this for initialization
     void Start () 
     {
         PhotonNetwork.ConnectUsingSettings(gameVersion);
     }
     
     // Update is called once per frame
     void Update () 
     {
         print(PhotonNetwork.connectionStateDetailed.ToString());
     }
 
      void OnGUI() 
     {
        
         GUILayout.Label(PhotonNetwork.connectionStateDetailed.ToString());
 
         if (GUILayout.Button("Connect"))
         {
             PhotonNetwork.JoinRandomRoom();
         }
       
     }
 
      public void OnPhotonRandomJoinFailed()
      {
          RoomOptions roomOptions = new RoomOptions() { isVisible = false, maxPlayers = 3, isOpen = true };
          PhotonNetwork.CreateRoom("", roomOptions, typedLobby: null);
      }
 }