I am a family law barrister and probably do 2-3 of these each month.

It's a very straightforward application, provided that you can have the papers served. If he avoids service, you can apply for substituted service (where he is served by post or at work etc).

You will be given a nice barrister, or alternatively your solicitor may do it for you, and you will sit quietly up the back of the court.

You won't get the Final Orders that you seek on the first day - it may take 2-3 court appearances before you get the orders that you need for Child Support etc. Make sure you have the "rejection" letter from Child Support.

Don't expect it to be a short process, it often takes 6 months from go to woe. You should tell Centrelink what you are doing so that they don't dock your pay TOO much.

Good luck.