How to create a times/player count based lobby with fusion.

We are creating a racing game using fusion, based off the fusion 100 dedicated server example code. We are wondering how we can create a UI that shows the game to join, number of players in the game, among other data. When a player selects this lobby, they will join and the game will start when 'x' number of players have joined. If a certain amount of time elapses before the minimum player count is reached, the lobby will be destroyed.