To explore both Bermuda and Ponta Delgado in one day, it's recommended to rent a car or hire a taxi. A taxi ride from the aquarium to St. Peter's Church should take around 20 minutes and cost approximately $25. A rental car for the day would cost an estimated $70 including gas, insurance, and taxes.
If you have more time, add a visit to the Royal Naval Dockyard or the Crystal Caves in Bermuda. In Ponta Delgado, consider taking a boat tour to see the coast or exploring the Parque Natural da Ribeira dos Caldeirões if you're interested in nature. If you have less time, skip Fort Scaur and focus on Bermuda or Ponta Delgado alone for a more leisurely pace.