If you already have an Offer in hand, then I would suggest you to go for EDP/ Officers as you have some experience.. In terms of Officer duties and roles.. Do your Homework..
1. Study about the company,see if you know any one from the company..
2. Go through detail information about Officer Roles and duties in general on google,if you are coming across any queries, research about it ask to any experts..
And I guess you would be good to go for that role..
*** (It's a big decision to change the Industry, but as you already have an offer in hand. then you can proceed it won't harm just give your 100%)
All the Best!
1st July 2014 From United Kingdom, London
Before even addressing your query, I feel the need to ask you the following questions:
1] What's your qualifications background?
2] What is/are the reason(s) for your step--"now I want to change my job profile to some industry other than IT"? Everyone always his/her own set of reasons for any decision--what's your's?
3] The 2 Offers you have in-hand [EDP/officer and store officer]--don't you think both are TOTALLY unrelated? What were the reasons for you to consider the stores officer position [I am referring to your even attending the Interviews]?
4] And the MOST IMPORTANT one: what is/are your career goal(s)/objective(s)?
While I do not wish to jump to conclusions with such an insufficient info, prima-facie, I think you are taking your career without any clarity of  where you want to go AND  an idea of your own set of capabilities--for which you would be the best judge.
Your inputs, though, may change my stance.
All the Best.
10th July 2014 From India, Hyderabad