From Shanghai to Nanjing South Station

Pls advice,
1) The most convenient station to take Non-stop train to NJ South Station as I'm staying next to Yu Garden Station in Shanghai on 28th Mar 19
2) Schedule to travel to NJ on 29th Mar 19 for 2 Adult what is the rate for 2nd Class seat and the travel duration required.
3) Can we pick up our train tickets upon arrival at Shanghai Pudong International Airport or you can advise me where can I pick up my train tickets.
4) If we collect our train tickets 1 days in advance what time do I need to arrival at the train station.

Thank you.