A van tour of the island can take in a bunch of the little sites and some of the bigger ones.
The island has a bunch of caves - commercial access at Crystal Cave. Public access at Tom Moore’s Jungle.
St George‘s is the original capital and is hundreds of years old. On that end (Eastern) if the island is also Tobacco Bay.
I think of Bermuda as a honeymoon and golf destination. And beaches, which will have relatively cold / nippy water in April. It is the Atlantic - think SC beach temperature. Not pushing a lot of adventure activities to cruise ships - No ziplining. No ATV tours.
They do have rum. So rum tasting boat trips.
The capital, Hamilton, is about a 30-minute ferry ride from the port (~$10 RT). It is also the transportation hub. By bus, it is 45-60 min. Taxis are expensive. Rental cars are not available. Restaurants, government, shopping. Colonial architecture along Front Street.
There is a restaurant and brewery at the port. We rode down there specifically for Sunday lunch (we were staying at Horseshoe Bay). The port was attractive as far as cruise ports go. The National Museum is located there, as is a useful pharmacy, a bakery and shops.