Thank you 😊 The course was part of my Udemy Business subscription from work, but it's usually around 12 Euros. The AWS study group at work lasted around 5 months or so, and consisted of around 3h of material per week, but it really depends on you and how much time you devote to it. I ended up going over several sections a month before the exam. A couple hours every evening every day. And the class is for anyone who develops / wants to develop in the cloud.