Hello,Ms.Lori
Take air-conditioned bus no.640 from Yinchun Road Changliu Road (迎春路长柳路), the nearest bus station of the hotel, to Shanghai Science and Technology Museum and then transfer to subway line 2 from Shanghai Science and Technology Museum to Nanjing East Road. Afterwards, take bus no.37 from Nanjing East Road Jiangxi Middle Road (南京东路江西中路). Take another walk about 300m, you will get to the Port.
The distance is about 9.5km. It is also ok to take a taxi.