UNet, how to create Internet game (like via PhotonNetwork)

Guys, i have a big question. I have been searching and watching tutorials on YT for Unity Network. Now UNet is not in Beta. And my question is: I registered game i get some ID, after a lot of time i find how to connect it with my project but now. I created game using PhotonNetwork where i got Looby where you select certain Room/Battle, then player wait in Room while all player were Ready and then Player tha t created Room start the game. Everyone load to new scene, spawn playerPrefab and lets play! But now i wanted to use UNet, but every tutorial use only local Server, but in services i have got 20 CCU to use (like in Photon). So how can i create Looby/Room/Ready waiting and start game? I found matchmaking, what should be something that i need, but i am really confused about it. Can someone tell me, how can i make rooms or matched wait until everyone is ready and then play the game? Thanks.