Plink, Let's start with what you are interested in and the time of year that you are planning on visiting. If things like whale watching are of interest, you will probably want to visit Hawaii Island, possibly Maui. Here on Oahu, we do occasionally see them, but not a guarantee. We would occasionally see the calves and an adult playing off of Sandy Beach, but those were rare instances that made us take a pause for the cause!
Hawaii is most certainly a food based culture, so you'll most certainly want to check around before you visit. Unfortunately, we lost a lot of hidden gem types of restaurants due to the COVID lockdowns and travel restrictions.
LMK if there are particular points of interest and I'll try to give you some recommendations!