Why do you want to change your idea. You have stated that your intention is to get into HR after completing MBA.
Here you are getting calls into Secretarial line of jobs only as your experience is into that only. No doubt this is a difficult phase to change the job within a this period as you don't have real time exposure into HR function.But you can project your exposure into HR related activities and face interviews to build up your confidence till you succeed.
All the best.
16th August 2018 From India, Hyderabad