I was there for a couple of days last weekend, lovely place..
Drink Żubrówka with apple juice, eat pierogi (Polish dumplings) on a terrace bar. Wander around and get lost, I did this - it's fun. It's not a huge city, you'lll find your way again.
Watch the drunk British stage parties swagger past and pretend not to share the same mother tongue as them.. If I was there for longer I would definitely study Polish. A lot of people in Kraków speak very good English .. But I really feel food, drink and language get you into a country. And read books about Poland.. I read Adam Zamoyski's History of Poland before I went, and also Finding Poland by Matthew Kelly, an Englishman of Polish/Irish descent writing about his Polish family's experiences in the 1930's and 1940s.
and to make you appreciate life- take a trip to Aushwitz. Then perhaps you may have a different perspective.
Definitely, I also made this trip - highly recommended ..