You CAN Get into Avesta

But it might be a pain. They are opening serves on a rotating basis, so those unable to get in at first, save a character slot and grab avesta when you can–

We will be carefully lifting character creation limits on servers to allow new players to join servers that they may not have been able to previously. However, we are closely monitoring server populations and queue times, so these character creation limits may return as queues begin to grow. Please be aware that the list of servers with account limits may change frequently, and that you will have to relaunch your client in order to access a server with a newly lifted cap. While we are still aiming to keep wait times low, we hope this helps some players join their friends on more servers.