The Dovahzul couse that is in here is amazing, really, but not every body has acces to it, becouse of the language, and also it is quite difficult especially with the first exercices, at list i didn't understand anything (i repeat it is a grate course) , maybe with a duolingo couse could be better. About the language, I could try to traduce it, but I don't understand a lot of things, so i would need help with that.
I hope the duolingo course is ready soon.