Being a regular cricket player I can advise a bit to improve your Leg Spin bowling. Spinners usually throw a stock delivery so, a perfect stock ball is necessary for flawlessness, but you need to deliver it with some variations.Learning how to hold a ball using your fingers with a tight grip and ability to cock (incline) your wrist can give best upshot. When you throw a ball and the opponent is ready to face it keep the seam straight after release. Press the ball with your thumb with less pressure, which can add extra spin.
WoW, why you are here! Just open your own cricket academy. Most of people here keen to learn things about internet marketing or some others stuff. Don't waste your time here.
The title says "needed" but you then give the advice. either way, it's good to see women playing cricket and sharing their knowledge.
Be a wrist spinner to be a good leg break bowler. See the history from shane warne to anil kumble .. and all the great ones. best luck