This is one tour that you should go on and it's good for you. Start with a ride on the ferry from Sydney's Circular Quay to Manly Wharf and you will find the Bike Hire just across the street from ferry terminal & bus stop in Manly. Pick out your bike (or reserve) from 10-speed to cruiser, get a map/directions and off you go. Many directions to chose with bike paths everywhere but try the ride up to the North Heads and enjoy the view of the entrance to Sydney Harbour. There are several places to picnic there and there's even a small restaurant that has free WiFi. Email some live photos to your friends at home. G'day mates !