Just finished duolingo stories
Incredible experience the one of being able to hear stories in Portuguese, especially the stories duo has to offer. Very helpful for the comprehension of the language that you are learning.
As a native English speaker, growing up in a bilingual (Spanish) home, I am attempting to learn Portuguese by only listening to the stories. I have not done any of the lessons, only listened to the stories over and over and over again. I may develop bad habits and speak Portunol but its a nice break from studying German. I started on set 4 in Portuguese.
I also took a break from studying and concentrated into the stories for some time and i have not grown any bad habits, but there is some words the stories do not mention that are essential for speaking and understanding Portuguese so you should study the tree as well