Hi. i want learn Germany and i using duolingo for it now.should i go to any class or duolingo it self can learn me everything?!
I'd say start learning with Duolingo :) Also, whenever you have German related questions add a comment to the 'German discussion' and the community will weigh in.
Your opinion is biased. :-P
I happen to agree though. Start with Duolingo, and then if you're still interested, look into courses.