How do I go from hong kong airport to foshan?

so i get to hong kong airport on june 16th at 13.15 pm, collect my suitcase get out of airport 2.00pm approx..i want to get to foshan, but the bus doesnt really interest me after a 12 hour flight....
so ferry or train..which would be the most convenient..which would be easier for me to get to, the ferry terminal or the train station..and could you provide idiot proof directions for me please..one more question what ever way i/we decide to use can the ticket be purchased and printed out on line (eticket)..or is it the old papertrail