Get to Kapolei and sign up for the Bushwackers Archery Club. This is the go-to place on Oahu. One of the best clubs I've been part of over my 50yrs of archery in 5 countries. They took me in as ohana (family) and shared the secrets of the island. If you join the club, you will see almost every archer on the island. It's 30ish walking 3D target range is great and has every class from youth (5yrs old), old recurve guys, to open-category big Hoyt-sponsored shooters. Island Archery shop by the airport was my place to get what I needed locally. There are about 3 ranges on Oahu. The state championships are held in the spring near Mililani.
Have fun and don't settle for just Oahu hunts.