I am staying in the Qube Hotel in Pudong. No.5500, Chuansha Road, Pudong Shanghai China.

You can take at any stop of the bus. From your hotel, I suggest you walk to Chuansha MTR Station to take subway line 2 to People's Square. Get out from Exit 20, you can walk to Century Square and then ask the local people about the boarding place of the sightseeing bus.

And as for the stops of the bus, you can refer to the link:
https://www.travelchinaguide.com/cityguides/shanghai/transportation/sightseeing-bus.htm

It costs CNY30 per person and you can constantly use it on both the lines within 24h. Thus you don't need buy separated tickets for the two lines.