If memory serves right there is a train approx every 10-20 minutes to downtown Zuerich. Travel time is around 15 minutes or so.
Immigration and customs is easy and fast, waiting for luggage is typically the longest delay.
Taxis are expensive and - depending where and when you go - not much faster.
From docking of the plane and arriving at the Station in Zuerich by train should take around 60 minutes total.

Flight times are typically padded. If your flight leaves on time, the wind is normal that day and your plane is not held up before landing you will arrive about half an hour early, sometimes even more.