The bible never says God is not one. Twice it refers to God as one and never as three. This makes no sense to me. Apostolic's are persecuted for this belief and to me It makes no sense.
And there are oneness people who can persecute someone for becoming one who believes in the Trinity. Ones claiming to be oneness can tell you you have chosen to go to hell, if you change to believing in the Trinity. I am not saying you or all oneness people do this or would, but I have heard this talk.
For one thing, if our Father is the same One as Jesus, this would mean Jesus is His own Son. But there are oneness people who can give you an explanation about this.
It is like how gold is only one gold, but it can be in more than one form . . . in the personal form of a father, and gold can at the same time be in the form of a son, and gold can flow and make more forms.
But, "of course", God is not gold, but
"love" (in 1 John 4:8&16). And you can't have real love, if you have only one person, I offer
God is our Father; "Father" is the name of a Person of family caring and sharing love.
And Jesus is the Son, another family Person, of love.
A human family that is one family has more than one person in the family.
Man, made in the image of God, is a family being, with three basic persons > father, child, and mother . . . in the image of God who is Father, Son, and Holy Spirit.
The Holy Spirit gives birth to and brings up God's children. And the Holy Spirit prepares us, the Bride, for our Groom Jesus. Bridal preparation is what I think usually a mother does. So, even though the Holy Spirit is called "He", in my Bible, and is not called "the Mother", still the Holy Spirit does what a family love being does in a mothering role.
And the Bible says,
"Therefore be imitators of God as dear children." (Ephesians 5:1)
So, the Trinity is not just an explanation, but our
example of how to love as family. There are oneness people and trinitarians who love their doctrine but they do not love one another; and they can threaten people with hell, in order to make themselves look superior and scare people into staying with their way of being trinitarian or oneness. But look at how Paul and Silvanus and Timothy loved the Thessalonians > 1 Thessalonians 2:1-12.
"And be kind to one another, tenderhearted, forgiving one another, even as God in Christ forgave you." (Ephesians 4:32)
So, Jesus makes us one with God >
"one spirit with Him" (in 1 Corinthians 6:17) > so that, in our spiritual union in oneness with God we can forgive,
"even as God in Christ forgave you." Is this included in the oneness that you teach??