The best way to practise New Vogue is starting with a good ballroom coach who also understands new vogue and that way your shapes, styling and musicality should be more sound when it comes to body mechanics. It is difficult to make un-sound shapes look musical even by the best dancers.
Repetition is the key and take a note from the Latin Dancers book, use mirrors.
Such sound advice.. our teacher has had to change venues and now there are no mirrors it is very difficult. I hope that can be resolved.