#steemfest visitors who have never been to Portugal should check out my posts about the country.
They are written from the perspective of a North American visitor, and focus mostly on the Algarve, about 3 hours south of Lisbon, but they do have a lot of general information about language, culture and so on which might help you. And who knows they might encourage you to visit places outside Lisbon.
FYI we visit in Feb.-April so the weather I talk about will be about the same as you'll find in Lisbon in a couple of weeks.
The first post (of 15) is here: https://steemit.com/travel/@brightongreg/portugal-1-winter-escape
Have a good trip and fest!