We have had two 3-night visits to Zurich.
Lucerne is about a 45 minute train ride from Zurich. It’s a small city and easy to walk from the station. The chapel bridge is a must see, it leads to old town which is nice to walk around. The chapel bridge is a walking bridge from the 1300s and still has some paintings on the ceiling that depict the horrors of the Black Death. Really interesting and sad, but they give you an idea of how people were impacted.
We did a walking tour around Zurich, don’t remember who lead it, but if you can walk for 2 hours there is a lot to see. I’m sure you can find one easily. The Lindt tour was just okay for us, (not a big fan of those mass produced truffle balls), but it’s good if you’ve never done a chocolate factory tour.
Zurich has trams that are easy to use and get you around town, also uber is there. Old town has lots of restaurants, you can just stroll along and choose where you want to eat.
During our second stay in Zurich, we booked an etuktuk tour with fondue and wine. A bit pricey but different and fun. Less pricey, we also visited museums, and bought prepared food at the market, took the Polyban funicular and picnicked by the university.
It’s a great city. Enjoy.