is that 6 months into Spanish with no prior experience? If so it sounds like you're doing extremely well
I have learned WAY more with Duolingo in 6 months (10 to 15 mins a day, but I started slower) than I learned in 4 years through High School (US). Just one data point, but I've heard similar from friends. TBH I am more motivated today than I was in school, so I'm sure that plays a part.