KJV, NASB and NIV are all decent versions.
Greek New Testament and Hebrew Old Testament if you really want to get authentic.
Bottom line is this. Simply pray to God for His guidance when studying Scripture after confessing any known and unknown sins to Him through faith in Christ for forgiveness. Upon your return to Him on His terms, he is faithful and just to return to us.
Try readings of a book in one sitting for context, topical studies between verses and books, and word studies where your interest may be struck through Him.
Each of us have different gifts. Each of us have a different pastor-teacher to follow. There are different plans for each of us, but always through faith in Him.
The more your mind thinks and behaves along Bible doctrine, the better equipped we all are for any problem that arises in life. Many of the most profound problems, for myself, have been those where I simply acted through faith in Him with little to no actual preparation for the problem and many times even any knowledge that the situation was problematic.
Funny how a faith filled life works that way sometimes. Seems the more we work at being faithful, rather than simply reliant upon His grace, the less prepared we really are under stress.
NASB is pretty good as a word by word translation, NIV as a verse by verse translation and KJV for reading the book in a whole sitting. Specific doctrinal studies will probably touch on all three, but also are amplified in Greek and Hebrew studies, from my perspective. Thank You Lord.
Some pretty reasonable exhortations, imho.
Though, I still wouldn't encourage someone to use the KJV unless they were into archaic English. Especially if they were younger than 30 or 40 years of age.
There are more than sufficient diversities of translation; root word studies etc. available to ferret out all the possible meanings of the original Hebrew and Greek for those serious about study--regardless of what modern translation they emphasize--as long as it has any solid scholarship and truly Biblical orientation and values at all.