"Study to shew thyself approved unto God, a workman that needeth not to be ashamed, rightly dividing the word of truth." 2 Tim. 2:15.
It's rightly dividing God's word that makes studying God's word acceptable to God. Without rightly dividing it, we are going to stand ashamed before God. No matter how hard we work to try to study it.
The KJV's not infallible. Neither is any other translation.