Oh, that's cool! I started learning Norwegian for similar reasons - Mormor (my maternal grandmother) was born in Norway, so there's family history involved (plus two of my verses are partially set in Norway).

Yes, the lack of Icelandic is disappointing. Although, virtually all Icelanders speak English. They start teaching it in school at a very young age, so most Icelanders are exceptionally fluent in English. (A lot of them also speak a third language, usually Danish or Norwegian.)

I can imagine Polish would bend your brain. Just the few Polish words I've been exposed to I'm like "wh- what?" and I say this as someone fairly used to Icelandic.