No, there is no Australian servers. The 2 busiest server's are Badlands and Volkmar ,badlands is Order controlled and Destro is Volkmar.
Good idea is select 2 servers above and play each side to get a feel for different playstyles and sides. If you are on Trial you can only go upto lvl10 or lvl11 in rvr. This is game more orientated towards PVP so you need to balance PVE play with PVP which is addictive.
I only started to play about 3-4 weeks ago all i can say is forget the principles of play as in WoW or any other MMO ,this game has it downfalls and good points. And has a steep learning curve in some ways. Just enjoy and have fun.
Ignarus est optimus telum pro bullying.