I'd love to translate for you. What the word of God is saying is...
For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one.
Don't believe the doubters that say, "That's not in the original Greek..." News flash...we don't have the original Greek. Leave it as it stands and believe it.
Since there are exactly 8 manuscripts from the 16th century that have this addition "The Father, the Word and the Holy Ghost, these three are one." it is quite likely that it is NOT in the original autographs.
Of course we do not have the "original" autographs! Not one person said, that if you had actually read the posts. We are talking about manuscript evidence for the Johannian Comma, which does not exist except in some obscure later manuscripts. Not even in your Textus Receptus manuscripts. Even Martin Luther left this extra part out of his German translation, and Erasmus left it out of his first edition, and only put it in after pressure from the Catholic church, of whom he was a priest. This was a mistake in the Latin Vulgate, and even Erasmus had to backwards translate from Latin to add it in. Because it could not be found in any Greek manuscript, at that time and was only added much later to some Greek manuscripts in Erasmus' future!
If the goal of the OP is to witness to JW's, there is no point pretending that the added point in 1 John 5:7 is authentic. That just deflects from his case.
I have some things I wrote up, on John 1:1 and "I am" in the Greek. I will start a post on it and see what you think. They are fairly long, but they might be helpful. They do depend heavily on the Greek, but because the JW's use a translation that is completely worthless, the New World Translation, it is important to go back to the Greek, to look at why their translation is so bad. And why the Bible proves over and over that the Trinity is true, and that Jesus is God.
PS. Not like Jaume said, either! Jesus was born the "incarnation of God" right from Matthew 1.
"
All this took place to fulfil what the Lord had said through the prophet: 23 ‘The virgin will conceive and give birth to a son, and they will call him Immanuel’ (which means ‘God with us’)." Matt 1:22-23
I will also say to the OP, if they are shaming you and calling you names like stupid, time to bar them from your house. This is verbal abuse, which is typical of cults, which the JW's are.