if i stay in King De Nathan , how can i go to ocean park and disneyland??

To reach Disneyland, you can walk to Yau Ma Tei to to take Tsuen Wan Line to reach Lai King where you can change to Tung Chung Station where you can find Disneyland Resort Line. Take it and you can reach Disneyland directly.
To reach Ocean Park, you can walk to the same station to take Tsuen Wan Line to reach Admiralty and then walk to Admiralty West to take bus 629 to reach Ocean Park.