well, lose 3 times or win 9 times whatever comes first. The more you win the bigger the rewards, and if you win 7 or more then you get enough gold to pay for another arena.
There was an update to the beta and to the launcher recently, and it's giving me a ton of errors trying to download it. Basically, the same stuff it was doing when I first got it. I don't know what fixed it last time, so all I can do is keep trying.
