Server 2 still functions like normal however so alternatively you could just wait until server 2 is online!
I would recommend following the instructions to join Server 1 as it may be a fix to the crashes that have been happening for a while now, and we still need more people to test it!
Normally it launches automatically once server 1 reaches it´s limit, but with the new patch and everything being tested out, it might be a bit different. I'm not too sure to be honest!