Hi there, zukkesketches,
Very nice sketches you got there! I looked at your quick sketches from your newest 1 hour class, and I think that you're on the right track, plus I really feel that my advice is, to really go for more relaxation. Why don't you please do your very first 30 minute class mode with what you're doing today?
The reason why you could do this challenge is because of 2 reasons: a) to make your poses less stiff, and more dynamic, energetic, and fluid. b) to help improve your understanding of human anatomy. Cheers and I hope you'll find these gracious and supportive. Keep it up!