It will be so much fun to be a newbie, Newbie! In other words, you will find plenty of different workouts to explore and become fitter in the process. Sometimes, although I am a now long time Cathlete (10 years +), I still feel like a newbie when Cathe comes out with new series. Although I am familiar with her style, I still get very excited. That is especially true when I learn new moves that I never even knew existed or that I could even dream of doing.
Also I think you will like the forums. Although I usually can visit them only once a week, I find there can be a lot of wisdom amongst Catheletes. In this sharing you may help someone and may, in turn, be helped. Welcome and best wishes on your journey to becoming a fully fledged Cathlete!