Hello Shiruyumi
I think you'll find the Bible is a bit heavy with vocabulary and phrases which are not very practical for modern, day-to-day Japanese. Could you perhaps choose another, lighter book that doesn't use liturgical King James English as a source? (Don't want to discourage you if you are indeed determined to use the Bible, but it seems a very daunting project to me).
There is another reader on this forum who is studying using Harry Potter, and I often think that this person has chosen something more challenging than is necessary. But compared to the Bible, Harry Potter is probably pretty easy going.
Anyway, sorry to hijack the thread. Good luck in your study, whatever route you choose.