Bro. Been a resident for two-years now. Check out: all of the Northshore (cafe haleiwa for food is a must), bonsai pipeline (north shore), roadside rotisserie chicken/shrimp trucks, Pearl Harbor, hanauma bay, lanikai/kailua beaches, Polynesian cultural center, go paddle boarding, kayaking to the mokes, ko olina coves, and try all the great food. Waimanalo is a beautiful beach where you can camp- that's a definite recommendation. You Military?
Golfing is f-ing amazing here too! If you need specific cuisine recommendations, just ask bro. Get your Shaka ready. We also have some delicious local vodka and rum! Great hiking (try koko head and stairway to heaven). A nice and easy hike is the pillbox in lanikai- which will have an amazing view at the top.
Avoid certain elements near the west side beaches (waianae). Traffic sucks so be ready for potentially long waits. You will have a blast here dude.