I think language would be a small problem in Hong Kong, so you can consider to travel by yourself. As you have kid with you, I think you should go to Ocean Park. Hk Disney is small. If you want to see the Giant Buddha and Nging Ping, you can visit Disneyland the same day. You hotel is not far away from Tin Shui Wai mtr station. You can take mtr Disneyland.
To Ocean Park, You can take mtr to Admiralty first and get out from Exit B2 to take Bus 629 which runs to the Ocean park directly. The hotel has shuttle bus to Tsim Sha Tsui, 20HKD per person. You can take mtr, which takes 18HKD (to Tsim Sha Tsui East). Then you can go shopping around this area to see HK Space Museum, Habor City, Avenue of Star, Temple Street in Yau Ma Tei, Lady's Street/Computer Street in Mongkok, etc.