One way to get around Lisbon is by taking the Tram 28. It's a tourist attraction in itself, and it stops at many of the city's main sights. A one-way ticket costs €3, and you can also purchase a day pass for €6. Taxis and Ubers are also available, but it's important to make sure the taxi is licensed and to confirm the price beforehand.
If you have extra time, consider visiting São Jorge Castle, which offers panoramic views of the city, or taking a day trip to the nearby town of Sintra. If you have less time, skip one of the locations on the itinerary or combine two. Make sure to wear comfortable shoes, as Lisbon is a hilly city and a lot of walking is required. Lastly, be aware of pickpockets, especially on Tram 28 and in crowded tourist areas.