Duolingo Stories is Awesome
Great new feature! Keep developing it, add French, and bring it to mobile asap! ;-)
do you really learn all three Romance languages - in your user profile - from scratch on DuoLingo, especially PT+SP?
Do you get easily confused or are you more profound in 1-2 of the other languages (e.g B1/B2 level, writing, speaking), before you started to learn a 3rd Romance language from scratch?
Yes, I started learning both Port and French here on Duolingo. I learned Spanish in college and then went really deep into it with immersion, living in Mexico, etc.
I recommend Duolingo for building a base knowledge and then to revisit to hone skills later on down the road. I think doing Duolingo for about 4 weeks then integrating Pimsleur and then online conversation classes is the perfect way to build a foundation speaking the language you wanna learn.
all three Romance languages
There's a lot more than 3 Romance languages.
Anyways, I believe some people have the ability to learn closely related languages. I mean, look at me! I'm learning Swedish, Norwegian, and Danish which are probably even more closely related than the "three Romance languages" you mentioned. There's nothing wrong with learning related languages at the same time.