You are NOT too old to watch this. Trust me when I say that the majority of the people who watch this are literally 16-25 year old's. I know for a fact that there are even adult married couples who watch it together. I myself am 19, so I think it's pretty safe to say that you're good! Now to answer your question about the season two release date, the only thing I know for sure is that it's coming out in the US on Netflix in December. They haven't disclosed the date yet unfortunately, but I'll let you know if I find out. And believe me when I say that you're not the only one wigging out for season two either! Can't wait!