If you're not in the closed beta for Total War: Arena, but want to try out the game anyway, you can do so this weekend. They couldn't move into complete open beta yet, because the game still needs some balancing, and after open beta starts there will be no more wipes. So they did an "open weekend during closed beta" event, where everybody with a Wargaming.net account can try the game for the weekend.

Total War: Arena is a lot of fun, but they still haven't completely nailed it. Strategic play isn't rewarded enough, while mindlessly shooting into the fray and causing friendly fire is rewarded too much. However ranged units are so damn inaccurate that if you punish friendly fire too much, they basically become unplayable. So there is still some work to be done on that front, and the devs admitted as much.