Ferry services from HK airport to Shekou

Hi. I will be arriving at Hong Kong airport at 1:50 pm and would like to go to Shekou residential district . Please tell me which ferry to take and the time schedule. Is there a border crossing center at the airport and what is the location to the center? Please advise on how to return to Hong Kong by ferry and is it the same border crossing when I arrived? I will be leaving from Shekou residential district to Tin Shui Wai for one night. What is the best way to get to Hong Kong airport from Tin Shui Wai at 6:00 am., ferry, taxi or train? My flight is at 9:30 am.