Do what?
Search BDM etc?
You really need to read up and learn about doing family history research. The only way to do your own family tree is to learn as you go. Reading as much as possible and learning which indexes are available and how to use them. You cannot just type in a name and find all the answers like the Ancestry ads tell you on TV.
Google either NSW BDM or QLD BDM or TROVE (which ever you want to search) put in names, narrow by dates and search.
Kellie