Venice is beautiful and quaint. You can’t recreate it anywhere. Because it is an island and it is an array of small alleys and streets with canals and small bridges there are no cars just motorbikes and mopeds and of course boats and gondolas. There are steps everywhere so there is a lot of walking. You can cross the entire area in about 45 minutes if you choose to.
The only one kosher restaurant is Gam Gam, the man’s name is Rami. Very, very nice people. All the people in Venice are nice and helpful, it is a very warm community and charming, very charming. There is basically no “New” construction it is all old world charm.
If you take the boat over to Murano, don’t be fooled into buying anything even if they say it is on sale. Just go to look at the gorgeous pieces and watch how they make the glass it is fascinating. You can get everything cheaper on the main land.
I haven’t been to Aroza, but I have been to Lugano and it was beautiful. Check the weather conditions in both areas as well as what there is to do so you can decide for yourself where to spend most of your time.