The perspective is believable and everything is pretty dynamic. For the pose to read more clearly, I recommend having more negative space for the the silhouette to be more readable. I adjusted the wings so that they don't cover the body and tail too much. For the arm, you just need to use cylinders to estimate where the joints should end be, a bit of deformation is fine as long as the overall silhouette is obvious. For the legs, I adjusted the curvature to fit the perspective more. This is a challenging angle and I think you are doing great, just keep it up.