Mr.Gardose,
Which hotel will you stay, Rambler Garden Hotel or Rambler Oasis Hotel? You can directly take shuttle bus to Disneyland.

Rambler Garden Hotel: You can get on the bus to Disneyland at coach park. It departs at 09:25 am. You need to pay HK$30.

Rambler Oasis Hotel: take shuttle bus at the coach park. It also leaves at 09:25 am. The ticket fare is HK$30 too.

To go to Ocean Park and Victoria Peak, you may go to Tsing Yi MTR Station to take MTR. Rambler Garden Hotel and Rambler Oasis Hotel offers free transfer between the hotels and Tsing Yi MTR Station. You can board on the hotel main entrance (L5).

Tsing Yi MTR Station to Victoria Peak: take Tung Chung Line to Hong Kong MTR Station and then walk through the passage to Central and get out at J2 Exit. Then go to the Peak Tram Terminus to take the peak tram to Victoria Peak.

Tsing Yi MTR Station to Ocean Park: take Tung Chung Line to Hong Kong MTR Station and then walk through the passage to Central. Then take MTR from Central to Admiralty and get out at Exit B and turn left to take No. 629 bus to Ocean Park.