Stairway is on Koneohe side. The start is just under the H3. There are two general ways to get to the trail head: up a spill way and back road or through a residential neighborhood and over a huge chainlink fence. Through the hood you have to deal with the neighbors calling the cops on trespassing. The state also pays for a security company to sit out there at the trail head to deter hikers so, if you’re at the stairs before sun up you are good to go. Literally don’t die either.
Also there is three peaks if you need an adrenaline rush of falling death. Lots of waterfall hikes on the east side.
You can go do cocohead stairs for sunrise and the other hikes anon suggested. There’s also Mt. Kahala ridge up to the water tower, radar thingy. Boyscout Camp on North Shore. Palolo Valley hike. Wilamina Rise hike. Manoa Falls (and associated trail systems).