You hotel is just next to Harbor City, so perfect for shopping. It is within short walking distance to Austin or Tsim Sha Tsui mtr station. So, you can walk to Austin first and then take metro to Nam Cheong first. Then change to Tung Chung Line to Sunny Bay. There is sopecial train to disneyland. Well, the first day from airport to the hotel: cheaper way is to take airport bus A21 (33HKD) and get off at Haiphonh Road Nanthan Road. Then walk 10 minutes to your hotel. Or take airport express (90HKD)to Kowloon first. The hotel provide free shuttle bus between the hotel and Kowloon station. For your hotel is just next to China Ferry Teminal, so, you trip to Macau would be very simple. After arriving in Macau Ferry Terminal or Taipa Ferry Terminal, you can find free shuttle bus to Venetain. To Ocean Park, Suggest you take MTR from TST to Admiralty and then change to the direct bus 629 to Ocean Park. After that, take free hotel bus to Kowloon then airport express train to the airport or take airport bus A21 at Haiphong Road (Nanthan Road 83).

From Airport to hotel, you can take Bus S1 to Tung Chung MTR Station and then take MTR to Austin Station and then walk to hotel.
2. Take MTR from Austin Station to Disney Resort Station.
3. Walk to China Ferry Terminal and then take ferry to Macau, after arriving, take free shuttle bus to Venetian Macau.
4. Take MTR from Tsim Sha Tsui Station to Admiralty Station and then take Bus 629 to Ocean Park. Back from Ocean Park by taking Bus 629 and MTR.

Your plan is feasible, just I suggest you taking Star Ferry from Tsim Sha Tsui to Central Pier and then take the Peak Tram to the Peak the day you arrive at Hong Kong.