moby02 wrote:how do i even start a family search if i only have the info on my birth certificate and my family wont talk about that side of the family ??? please help me

Ok...
A lot of people can relate to your problem. Sometimes they don't talk because they do not think the know anything. Sometimes there is something in the background they do not want revealed. But ususally there is someone...a cousin, and uncle or aunt, a close family friend that might be able to shed some light. You might also consider the following:
Get a copy of death records of family members. Get obituaries when you can. Get cemetery records. The cemetery is often a great place. They can tell you what family is buried in the same plot with your relative. They can tell you who owned the plot. They can give you information on other people with the same family name buried in the same cemetery. All of this will help you to begin to identify family members.
I am sure Australia has a naturalization process like the US does. Were your grandparents or great-grandparents citizens? You do need to identify the immigrant ancestor and dig up everything on that person you can. If they are naturalized, often the paperwork applying for citizenship will give you maybe the place of birth, parents names...I am not sure about citizenship over there.
If they lived in the same part of Australia from many, many years, did they go to the same church? If so, the church might have marriage, christening, burial records that might be of help. Of course, best to start with a date and time and event you know and then try and work backwards from there.
But do check out other people with the same name. They are probably related at one time, but you may not be in touch with today....you would be surprised with what you can find out. Also ask those who do know about to tell you stories about when they were young. Often, it will give you some more info to work with...some nugget that will lead to more information.... where did grandpa work? tell me about grandma...etc.
This can be done. But the more information you can gather in terms of records, the more likely you will begin to ask better questions. Sometimes people say they know nothing, but once you prime the pump it begins to spill out.
I got Aunts and Uncles and cousins together at a picnic and asked a few questions and sat back and listened....you would be amazed!!!!
Hang in there.....keep us informed....and best of luck to you!