First congrats to slip on the move to Oahu!
Years ago when I worked at a DOD summer job, the mainland transplants told me the 2 hardest things were 1) lack of seasons (yes, another sunny day can get boring
) and 2) can't drive very far, islands are pretty compact; Oahu-Honolulu wasn't called the 'rock' for nothing....
If you can get past #1, I think you'll be fine.
One small point on pronunciation. the 'W' should be pronounced as a double-u when it's at the beginning of the word and is followed by an 'a'. In all other cases it should be pronounced as a soft 'v', but as Dave noted, there are colloquial aka 'local' exceptions.
So examples: Waikiki, Waipahu, Waianae etc are all pronounced as a double u, 'why'
Weke is a hawaiian name for a local fish, pronounced 'veh-keh'
Wiki wiki means quick, and is usually pronounced with the double-u (exception). I haven't heard anyone say it as 'vee-kee vee-kee' as it should be.
Hawai'i should be pronounced as 'Ha-vai-ee', and is by Hawaiian speaking locals. Other locals will also say it with the double-u sound.
The apostrophe glottal stop between vowels means each one should pronounced separately, and not strung together. Here's another good one, Ka'a'awa or Kaaawa is a local place name. Pronounced 'kah-ah-ah-vah'
Hawaiian is a syllabic type language like Japanese.