There is no single timetable for earning an Australian Private Pilot Licence. Your progress depends on your training pathway, how regularly you fly, the conditions and how confidently you demonstrate the required skills.
Theory and flying develop together
You need aeronautical knowledge, practical instruction and the applicable licensing assessments. Minimum flight experience is not a promise that every student will be ready at that point. Ask your flight school to explain the current CASA requirements for its course and your circumstances.
What changes the timeline?
Lesson frequency, weather, aircraft and instructor availability, revision needs and personal commitments all matter. Medical and administrative arrangements also benefit from early planning. A realistic schedule leaves room for interruptions and consolidation.
Starting theory early can help you make better use of each lesson. Explore the subjects and agree a coordinated study and flying plan with your instructor.