That is your choice. After having advanced degrees in Biblical Studies and Church History, as well as several years of both Hebrew and Greek, I have found the KJV to be one of the LEAST accurate translations.
Although, I do love it for memorization, it is very poetic.
That will depend on what Greek and Hebrew manuscripts you’re reading, but most of them agree with the King James. Only a few of them don’t, and those manuscripts are so full of errors they won’t agree with anything.