Some of the resources I use for your research are:
Ancestry subscription
Genealogy SA membership
My Heritage
Scotlands People
Find My Past
British Newspaper Archive
State Library of South Australia - local and electronic resources
State Records of South Australia
Lutheran Archives South Australia and other church archives
Family Search
University Libraries
National Library of Australia
International archives and family history societies
New South Wales Family History Transcriptions
Judy Webster's Genealogy Tips & Indexes