Hi Praveen,
Six Sigma methods and tools are particularly well-suited to support the development of an organization's sales capabilities. Apart from identifying those activities which are critical to winning business, you can also improve the predictability of sales processes and results and thereby raise the level of performance of your sales force.
Six Sigma, when applied to sales, generates long-term, sustainable value-both for your company and your customers and brings a discipline and performance orientation that will drive business results to levels never before imagined.
A part time MBA would help you to grasp the concepts well due to your recent exposure to statistics & mathematics which is a part of the basic MBA curriculum.
There should be no second thoughts about it, Now is the right time to begin your Six Sigma journey by undergoing the Green Belt Certification.