Which are the courses I should opt for after having 6 years of work experience and a graduate degree in Economics?

i am manoj. i completed B.A. Economics in 2010 and i have 3 years ex. as store clerk and 3 ex. as computer operator and now i am working as store keepar in bulk chemicals factory plz tell me which course is better for me or can i will do store managemnet or other course which is heplful for me