There are many versions available and which one you choose is not as important as some may claim. I will focus on the 2 primary (most popular) versions, the King James and the New International Versions. For example, some say the King James Version is the most authentic. They point out that the New International Version has a couple of chapters that do not include some of the verses as the same chapters in the KJV. Essentially, the NIV cuts these chapters off at a certain verse, whereas the KJV keeps going for a few more verses. While that is a valid concern, I still don’t think it’s a justification to denigrate the NIV.
I have read both versions cover to cover. Personally, I like the NIV because it’s easier for me to comprehend. The old English in the KJV can be confusing at times. As such, I feel the NIV is the best version for me because I don’t lose much, if anything, in the translation.
Now, if I were to recommend a Bible to a new or returning Christian, as you asked, I would recommend the New International Version. In addition, I would recommend a study version of the NIV. The study Bibles have Biblical scholars notes for each passage, which can be really helpful when a passage is confusing or has multiple ways of interpretation.
The Bible I use the most, my go-to Bible, is the John MacArthur Study Bible. It’s the NIV version and Pastor/Dr MacArthur is, in my opinion, the greatest Biblical scholar of our time. He is in his 80’s and is still actively preaching in Southern California (Grace Community Church) and has a seminary school he still runs and teaches. He also has a prominent online presence at gty.org (gty = Grace to You). Lastly, he has a Grace to You podcast, which has a new sermon every day M-F.