Elena was an excellent host! She gave us superb suggestions for sightseeing, beaches and restaurants.
Bus number 3 is just 45 second walk from her apartment. It takes you to Plaza de España (15-25 min), the nice beach at Illetes (last stop with the bus). You can also reach the Joan Miro museum by taking bus 3 towards Ses Illetes.
I high recommend Elena as a host.