Carinthian Lakes

Hi everyone, who fancies a long weekend trip to one of Carinthia's lakes starting from the end of August (throughout the warm September)? I'll be travelling by train from Vienna. I'd love to explore Weissensee, Ossiachersee, Faaker See, or Millstätter See. Going for a swim and also renting bikes to cycle around the lake or explore the area. I'm 34, from Vienna, a non-smoker, easy-going, humorous, empathetic, considerate, and caring. I'd be happy if you share similar qualities. However, I'm also open to other lakes in Austria, e.g., in the Salzkammergut region (like Attersee) with bike rentals to cruise around. Where else in Austria do you like to go for a short trip? Let me know. I'm open to ideas. I also enjoy hiking, for example.