If you”re on a timeframe, the highlights of Krakow can be done in 3 days. We were here for 5 and still had plenty to do and see. I would break it down like this:
Krakow main square/Wawel Castle
The Jewish Quarter/Schindler Factory
Most Polish people speak English on some level.
Poland has their own coin PLN. On this trip, it was approx 4:1 USD.
Reserve tickets in advance for a Wawel Castle and Schindler Factory.
The Polish people are welcoming and friendly, and not without a sense of humor.
(Milk; Vodka; Beer)
It also felt completely safe. I saw very few sketchy people in the tourist zones we visited.
Krakow is a beautiful city and worth a visit.