Hello, and welcome. First I would like to say, trust your internal instinks that are telling you that something is not right. Dont be like some of us here that stayed involved with doubts for years and years.
One thing that i can suggest to you is to get your hands on a copy of the book Crisis of Conscience by Ray Franz. He was an elder and member of the governing body in NY, and he explains everything you need to know in this book about the false teachings of the witnessess.
There are NO scriptures in the bible that show you are to use the watchtower along with the bible for study.
Also ask them to show you from the scriptures where is says to use the wt, or anything you may question that doesnt seem right. And if they give you a scripture, share it with us, and we can show you how they try to use scripture to prove their theory, but are actually missquoting the bible.
By the way, the New World Translation was translated by a man who had only 2 years of schooling on translating the greek scriptures, and was only self taught on translating the hebrew scriptures, so I dont thing that that is much education on the bible to be able to be an accurate translator.
I hope you find the answers you are looking for, but be assured, the wt society if not the place to find it.
They are a very controlling unloving organization, and many lives have been destroyed because of it. Use precaution and much prayer, and God will show you the answers.
God Bless
Shelley