I'm doing a round system with different places in roblox lua, how can I start?

Question

local Jugadores = game:GetService("Players")
local TeletransportadorServicio = game:GetService("TeleportService")

local partida1 = 9199129451
local partida2 = 9199309873
local partida3 = 9199310158
local partida4 = 9199310447

local texto = game.StarterGui["Menu inicio"].Frame.texto_jugadores

local jugadoresTotal = #Jugadores:GetPlayers() -- esto coge los jugadores totales

local LobbySpawn = game.Workspace.LobbySpawn
local GameAreaSpawn = game.Workspace.SpawnLocation

Jugadores.PlayerAdded:Connect(function(player)
    texto.Text= "Not enough players"
    
    if jugadoresTotal >= 2 then
        local contador = 10
        while contador >= 0 do
            texto.Text= string.format("Quedan %d segundos", contador)
            wait(1)
            contador = contador - 1
        end
        


    end
end)

This is my code, only this took me a lot of time. I made the variables partida# and the value is the id from each place. I want to dynamically start games when other is running, I don't only want a help for start developing it and where I can find the information, thanks.

I tryed a lot of tutorials in youtube but any of them worked.