Dear HK,
It looks like you are on the right track given that you are already reading the BABOK and looking for ways to start your new career as a business analyst.
Sticking with an industry in which you already have experience is a very good idea - at least until you gain some practical business analysis experience.
I would suggest you join the local chapter of the IIBA as well as consider taking one or two courses in business analysis. It is very important for every newcomer to our profession to have a good foundational understanding of the role of the business analysts, the types of activities that a BA performs, and the types of tools and techniques available to them.
Good luck in your journey! Keep us informed on your progress...
- Adrian