The profile you have will suit the two-year (hybrid model) EPGP program. If you do not wish to leave your job then this course can be good for you. Otherwise, you can go for full-time programs of one year at IIM ABC, SP Jain, or ISB. These are currently some of the top one-year programs.
E-commerce has gained a lot of popularity over the years and the scope is tremendous. Having work experience before joining an IIM will always get you plus points.
You will have good placement opportunities in IIM Kozhikode. The recruiters who visit the institute also offer very attractive packages. The average package is also high which makes the ROI manageable. If you take EMI it can be paid easily in five years. Internship opportunities are also provided to the students.