Rangiku starts with gathering her chakra, she first tries to gather the enough amount of chakra so that she can move her shadow forward. She tries to focus her chakra to her feat, realizing that chakra gathering and control is key here. She then channels the chakra through the shadow and makes it move a little forward, although it wasn't a big achievement at the beginning.
She then gives it a second try and this time moving her shadow a bit forward.
'I hope I was good with this sensei', with a glimpse of happiness on her face, she waits for sensei to answer and respond.