I stay in Mākaka, HI, which is already one of the most ethnically Hawaiian place I think in the world. Most of my friends and neighbors where I stay are ethnically Hawaiian. And local pidgin grammar is based in Hawaiian, so understanding ōlelo helps with understanding pidgin. And yes, integrating and working with the local community, but also just reading street signs, speaking it casually, also useful. Iʻm also considering maybe doing a law degree (just for fun), and if you want to read kingdom period texts, its all in ōlelo Hawaiʻi.