Find a flying school and go for an introductory flight. These flights are normally 20 to 30 minutes in duration. They allow the instructor a short time to assess your coordination and general attitude toward flying and you to feel the freedom of flight. Most people come back and start lessons straight away.
As you will read on CASA website:
“The first step in taking up flying, as a career or just for pleasure, is to undertake a Trial Instructional Flight, or TIF, at a licensed flying club or training organisation. TIF lasts around 30 minutes. This trial flight will most likely lead to a few lessons after which you should be able to decide whether you want to continue flying training. Your instructor will also be able to make an assessment of your potential to handle an aircraft.
During the initial stages of flight instruction, you will always be with a flight instructor. You will be taught the basics of flight in preparation for your first solo flight in the circuit area (rectangular pattern flown around an aerodrome) but will be familiarised with the local training area, usually a ten-mile area around the airport. During this time you consolidate your training and build flying experience. Most likely, you will be ready to fly solo after approximately 10-15 hours of instruction. However, each subsequent solo flight must be authorised by your instructor.
Before you can fly solo, you will need to pass the required medical checks, pass an examination in Air Law, and be issued with a Student Pilot Licence (STUDENT). To be issued the SPL, you must be at least 16 years of age and be capable of reading, writing, speaking, and understanding the English language. You will also need to obtain an ARN (Aviation Reference Number) from CASA, supply photographs and identification documentation, and complete a security check.
If you have set your sights on a career in aviation, this is usually the time that your school will advise you of options for commercial training. They will also suggest that you undertake the required medical checks which are more exacting for professional pilots to make sure you can satisfy the medical standards before outlaying considerable sums of money on flying training.”