Hi,there
That is a resonable plan. Visit Ocean Park first and then the Peak and the avenues of stars at last. Here below is the transportation:
Take MTR from Tai Wo Hau station (not far from the hotel) to Admiralty and then bus Special Bus Route 629 to Ocean Park. After your visit of Ocean Park, take the same bus back from the Ocean Park to Central and then take a taxi to the Lower Peak Tram Terminus which will take you up to the peak in the tram. Then take tram or bus down from the peak to Central. At this time, take either star ferry or MTR from Central to TST. Check this page out: http://www.avenueofstars.com.hk/eng/location.asp

After arrival at Discovery Park Bus Terminus, what to do next? Is the terminal far from the hotel?

Hi,again
Sorry but what do you mean by Discovery Park Bus Terminus? I didn't mention that in my post.