Personal drop off

Hi, I am going on a cruise Charm of China and Yangtze River for 12 days. The Travel agents sent me the Itinerary from Canada. This cruise is in The first week in December. Do I have to bring in the visa application form myself or can I send it with someone or email it. Is there an interview as with the US embassy? Do I have to call to make an appointment? Please advise the procedure since I will have to close my business place in order to bring it to Port of Spain personally. What payment method do you accept? Please advise the easiest method. Thank you