we will stay in tin hau, Hong Kong and plant to visit Disneyland, Ocean Park and Macau.

From Tin Hau to Disneyland, you can take Island Line from Tin Hou to Central, then walk to Hong Kong station to take Tung Chung line to Sunny Bay, then take Disneyland Resort to get to Disneyland. It costs HKD24.5.
From Tin Hau to the Ocean Park, you can take Islan line from Tin Hau to Admiralty and then take bus 629 to the Ocean Park. It costs about HKD15.
From Tin Hau to Macau, you can take metro to Sheung Wan, then walk to HK-Macau Ferry Terminal to take ferry to Macau. The metro fare is hkd5 and the ferry fare is about HKD150-183.