Is the 'vestfirsk' dialect really that distinct for a beginner?

I’m moving to the Westfjords soon for work and I've heard the regional variant there—specifically the 'vestfirsk' pronunciation—is quite unique. Will standard modern Icelandic audiobooks actually prepare me for real-life conversations in Isafjörður, or will I be completely lost? I want to make sure I don't sound like a textbook when I arrive.