I might take into account the train if you can find to your North shore line. You change at Wynyard on the airport line, it is comparatively simple. There are lifts at both stations and also the journey from Wynyard is about 25 mins. The moment your flight has landed, https://sydneyhirecarchauffeurser74062.tribunablog.com/sydney-airport-transfer-no-further-a-mystery-40336874