I've been told that if I'm reading anything other than the KJV, then I need to stop because it's not the true word of God.
You have been told a falsehood.
I know some people, especially those with disabilities, have a hard time understanding the KJV, as I do myself. I find it easier to read simpler versions of the bible. What do you think?
I have an IQ two standard deviations above the norm, several graduate degrees from a variety of state and private universities, a dozen different English translations of the Bible, 35 years of diligent study and I find the KJV difficult to read. It has nothing to do with disabilities and everything to do with the fact it is 400 year old English not commonly used any more.
Is the ESV really not the true word of God? Am I sinning if I read any other version other than KJV?
No, you are not sinning if and when reading the KJV. That's utter nonsense and you'd do well to stay away from KJVOnlyists because they are being legalistic.
There are no perfect translations. All you need to observe to understand that is 1 Corinthians 13. The Greek word "
agape" is translated as charity. that's the only place the KJV translates
agape as charity. it is not even consistent with itself! "
Agape" means love; that's how it should be translated and that's how all the other versions translate it.
The ESV is an excellent translation. The translators tried to trike a balance between formal and dynamic translation, with a slight emphasis on the former. They did a good job. I've used many translations. Started with the KJV and the Good news (paraphrase) when I first became a Christian. For years I used the NIV. I currently prefer the NAS because of its literal word-for-word emphasis but I also use other translations including the ESV and the NLT, the latter of which is sitting in a book rack in one of my bathrooms as I venture through another cover to cover reading of the Bible. Sadly, I do not find
that translation very good and do not recommend it. The same is true of the CEV.