It is best to study the Bible using an unbiased Bible translation. In fact it is good to have several translations on hand.
The NWT was written by the Watchtower and slanted towards their beliefs. It is not considered to be an accurate translation. That's why no one uses it except the Witnesses. See NWT
If you would like to argue that your religion is correct about everything, in spite of the evidence, then by all means, the NWT is the only Bible for you. However if you are open minded and searching for happiness in your life, consider reading as many other translations as you can.
Compare what other translations say to what the NWT says. Sometimes it will be the same. Sometimes it won't. Whenever you're confused about what a scripture means, read the same passage in several different translations.
We really like the NIV study Bible. It's relatively inexpensive, written in plain English, and is jam packed with factual information to aid you in the understanding of the Bible. However ALL translations have value. If you're confused about what a scripture means, Google it and read as many translations as you can.
An automatic habit of Witnesses is to use a Watchtower concordance or refer to Watchtower literature for an explanation of what a scripture means. Avoid doing this if you want the truth. Let the Bible by itself speak to you. Let they Bible be your primary textbook. Let Watchtower literature and all other 'interpretations' of the Bible be secondary references.
It is common for Watchtower literature to make statements and reference scriptures to prove what they say. Almost anything can be 'proved' doing this. Instead of using Watchtower literature to explain the Bible, use the Bible to explain what the Watchtower says. If what the Bible actually says is different from what the Watchtower says, why is that?
If you really want to understand the Bible, read an unbiased translation. And if possible read several different translations, especially when there are scriptures you don't understand.
Next do research from MANY different sources as to what specific Bible passages mean. Good study Bibles will have plenty of references beside each Bible passage. Books are available that explain the Bible. Google is also a good reference, but don't believe everything you read. Consider the credibility of the source first.
In spite of all your efforts to know the truth about what certain scriptures mean, there will always be some scriptures that can be interpreted many different ways. In other words the meaning is unknown. Whenever you want the 'real' answers and 'the truth', pray about it. The more questions we ask God, the more answers we receive.