Dear Querist
my opinion on your queries are as under:
1. My husband & I both live in Australia separately, he is living here illegally without a visa, he has never left Australia.
Opinion: you may file a divorce petition at Australia.
Is his family (in India) able to apply for divorce without him or myself. As I have our marriage certificates, will his family be able to apply without marriage certi.
Opinion: No, they are not authorized to file the divorce case without any power of attorney executed by the parties and noterized and verified from High Commissioner of India.
2. I don't know what work he does or where he lives, so how will I find out what his annual income is?
Opinion: The last residence will be the residence at the time of filing the case.
3. As for the alimony how many years would I be entitled to, have been married since 2008 & I'm still unemployed, we have no child from the relationship?
Opinion: you may get 1/3-1/2 of his income as alimony/maintenance.