Beta-testing is planned to last until final version of the game is released.
Very 1st race is special as every player can enlist (but only top 30 will qualify). This one had a practice that lasted a full week and qualif will (finally) be done tomorrow.
Once this one is "launched", new races are supposed to be proposed on different tracks. Each race will accept 30 players. Once the milit is reached, game starts and new game is proposed. That's what I understood from the manager.