I'd consider the educate if you can find into the North shore line. You alter at Wynyard towards the airport line, it is pretty uncomplicated. There are actually lifts at the two stations along with the trip from Wynyard is about 25 mins. The train from the town to Ryde https://eduardorelue.fitnell.com/66758119/the-2-minute-rule-for-sydney-airport-transfer