Thanks for your question!
The Australian Electoral Commission has all sorts of information about federal elections, including a list of all current registered political parties in Australia. This might be a good place to start for general information about voting in an election.
However, each Australian who votes in an election needs to make their own choice about which candidate to vote for, based on the policies of each candidate. Most political parties have websites with detailed information about their policies. The Australian Government's Department of Education also provides a brief overview of the policies of each major party.
If a candidate is an independent—they do not belong to a political party—they may have their own website listing their policies.