What would be the easiest way to get from Shekou Ferry Port to Harbour City in Kowloon by ferry?

Well, you can take direct ferry to get to Hong Kong-Macau Ferry Terminal first. The schedules are 07:45, 10:45, 11:45, 14:15, 16:45 and 19:15. Then take Island Line to Central Station and Tsuen Wan Line to Tsim Sha Tsui Station, Exit A1. After that, walk west along Haiphong Road around 380 yards to find the destination.