What Is The Best Choice Here?

Rishi,
Irrespective of whether you change your field of work, the pgdba course will give you additional knowledge. Symbiosis is a reputed Institute. So, you lose nothing other than your leisure time. It's put to good use.
If nothing else, it will help in your content job with additional domain knowledge.

Dear Rishi ji,
I will add at the cost of some repetition. Be positive always. Set your goals. Write down your Vision in clear Words. Read it daily. Visualize it round the clock. Believe it, there is a power in it. So do it. I did it. I do it.
Ofcorse, you need to do SWOT analysis of yourself. You are the best judge of you. I have appreciated the posting by Saswata ji. Once again, All the Best.