It is suggested that you take metro from Tung Chung where the hotel is located to reach Admiralty firstly. The fare is HKD20.5/adult Here, you could catch the bus 629 to get to the Ocean Park directly. The bus fare is HKD10.6/adult. It is the easiest and fastest way. When you return from the Ocean Park, you could use the bus 629 as well and then get off at Central, where you could take the Peak Tram up to the Voctoria Peak. Finally, you could use the metro back to the hotel directly.