reniaa,
All I can do is tell you that I am one who reads and studies the Bible daily (with rare exception), and has done so for decades, I used to be a JW, but found their doctrines and theology unsupported by Scripture.
The trinty vs non-trinity interpretations of the God's nature as revealed in the Holy Scriptures have been debated since at least the third century, at the council of Nicaea.
The issue is further complicated by numerous definitions and beliefs of the very definition of "the" trinity.
After decades of debate and research, I have come to be somewhere between Arianism (Unitarian) and Trinitarian beliefs.
I believe that Scripture clearly teaches that God, the Father, YHWH, exists outside of time as we define it, and has no begining or end.
I believe that Jesus Christ is His only begotten son, His only direct creation, and that He, Jesus Christ, went on to create everything else.
I believe that the Holy Spirit is either a person, or God's active force, I find it impossible, to date, to decide on one or the other, based on the Scriptures describing the Holy Sprit.
I believe that the Father, the Son, and the Holy Spirit are ONE in the nature of their unity, purpose, and Spirit.
In other words, I understand how (at least some percentage of) Trinitarians come to their understanding, and I understand why, based on Holy Scripture, I believe as I do.
This website would make an interesting read for you:
http://prosites-hobarker.homestead.com/trinity.html
Ultimately, the Trinity doctrine is not explicitly found in the Bible. Further, I think that God, in His Love, Justice, Wisdom, and Power would have answered this question explicitly if it were necessary for salvation, which it clearly isn't. Salvation comes by God's free gift, grace through the redemptive power of Christ's sacrifice, so that all who put faith in Him might recieve life, rather than death, which is what we deserve.
I normally would cite Scriptures to make my point, in this case, the whole Bible must be read over and over, with God's Holy Spirit upon you, to reveal these truths. My advice is to get out of the Jehovah's Witnesses ASAP, pray to God for His Holy Spirit, put your faith in Him and His Son's saving Grace, read His word the Bible, meditate on it daily. Live a life that befits repentance, full of good works and kindness. And always remember:
If you had known what these words mean, ‘I desire mercy, not sacrifice,’ you would not have condemned the innocent. (Matthew 12:7)
You must make it your habit to speak and act like people who are going to be judged by the law of liberty. For the one who has shown no mercy will be judged without mercy. Mercy triumphs over judgment. (James 2:12-13)
"For in the way you judge, you will be judged; and by your standard of measure, it will be measured to you. (Matthew 7:2)
Do not criticize each other, brothers. Whoever makes it his habit to criticize his brother or to judge his brother is judging the law and condemning the law. But if you condemn the law, you are not a doer of the law but its judge. There is only one Lawgiver and Judge—the one who can save and destroy. So who are you to judge your neighbor? (James 4:11-12)
But when the kindness and love of God our Savior appeared, he saved us, not because of righteous things we had done, but because of his mercy. He saved us through the washing of rebirth and renewal by the Holy Spirit, whom he poured out on us generously through Jesus Christ our Savior, so that, having been justified by his grace, we might become heirs having the hope of eternal life. (Titus 3:4-7)
Let us then approach the throne of grace with confidence, so that we may receive mercy and find grace to help us in our time of need. (Hebrews 4:16)
Shouldn't you have had mercy on your fellow servant just as I had on you?' (Matthew 18:33)
"Woe to you, teachers of the law and Pharisees, you hypocrites! You give a tenth of your spices—mint, dill and cummin. But you have neglected the more important matters of the law—justice, mercy and faithfulness. You should have practiced the latter, without neglecting the former. (Matthew 23:23)
His mercy extends to those who fear him, from generation to generation. (Luke 1:50)
"Which of these three do you think was a neighbor to the man who fell into the hands of robbers?" The expert in the law replied, "The one who had mercy on him." Jesus told him, "Go and do likewise." (Luke 10:36-37)
For God has bound all men over to disobedience so that he may have mercy on them all. (Romans 11:32)
BA- Now we see but a poor reflection as in a mirror; then we shall see face to face. Now I know in part; then I shall know fully, even as I am fully known. And now these three remain: faith, hope and love. But the greatest of these is love. - 1 Corinthians 13:12-13
PS- May it never be! Rather, let God be found true, though every man be found a liar. - Romans 3:4
