Carla is a really nice and hospitable host and has a lot of tips of what to do in and around Lisbon. The apartment is very central, which makes discovering Lisbon by foot (areas Baixa, Chiado, Alfama and even Bairro Alto) very doable. But you can also take the popular tram 28, which passes and crossed these areas. The bedroom is simple, but you will be mainly using it for sleeping if you are exploring the city from a central place, or chill for a bit in the cosy kitchen.