From the ops manual
the pilot ensures their competency to operate the aeroplane type (refer to RAAP 1 – 2016 Type Transition Guidance) and holds all required Endorsements for the aeroplane and the intended flight (refer to Section 2.01 – Requirements).
Link to the document is here: https://members.raa.asn.au/storage/raap-1.pdf
Extract
Pilots should make use of all available resources to ensure they are well prepared before flying an unfamiliar aircraft as pilot in command. Recommended actions include:
• Read and understand the Pilots Operating Handbook for the aircraft;
• Seek advice and assistance from experienced instructors or other pilots experienced with the type;
• Ensure you understand how the aircraft differs from aircraft you have flown before;
• Ensure you know how to use all the knobs, buttons, levers, dials, etc. before take off;
• If necessary, have someone experienced with the type fly with you before you fly the aircraft as PIC.
I have flown 3 different types of aircraft, each new one I had a CFI train and then sign me off in my log book.