Places to visit in Hangzhou if I stay for abou two days.

I think you may need to spend a day and a half to visit the West Lake area and use the last half day to reach Qinghefang Ancient Street and Six Harmonies Pagoda.
For the detaill information you can refer to https://www.travelchinaguide.com/attraction/zhejiang/hangzhou/west_lake.htm and in that area, you can travel by local public bus. Bus Y7 is suggested for you.
Hope the information can help you.