I'm not going to debate the Trinity here. It is enough to say it is a very muddied impure form of monotheism, and not in line with the God of the Tanakh.
I don't know where you get the idea of God having two natures, deity and soul. This theology is not present in church teaching. Is it your own idea? Or perhaps you are just influenced by someone else making up their own theology.
You do not know what you are talking about. Of course God is a Trinity.
Because you can not see it does not mean it is not a reality.
No one can see God. The Father is God with only one nature. No one can see God.
What is needed? Is a means for making God seeable.
Men are souls. God transcends a human soul. No soul without some means to make it possible can be shown God in a manner we can relate to.
Well? Guess what? Jesus by means of His Soul being in union with the Father... is able to translate and "interpret" God in a manner that is expressed by His Soul. To we who are souls. Jesus "interprets" God who is foreign to our comprehension, and makes God knowable in terms and actions we can relate to!
Here is where it says that is so...
John 1:18...
First I will give a standard translation. Then I will give another that brings out what the Greek is telling the Greek reader. I learned this from a pastor who taught from the Greek text. He said that the Greek word used for the function of Jesus is the same Greek word used in relation to pastors when they are commanded to "exegete" the Word of God for their flock.
Here is a standard translation of John 1:18.
No one has ever seen God, but the one and only Son,
who is himself God and is in closest relationship with
the Father, has made him known.
And, here is a closer rendering of the actual intent of the Greek text
No one has ever seen God, but the one and only Son,
who is himself God and is in closest relationship with
the Father, has declared Him [He has revealed Him
and brought Him out where He can be seen; He
has interpreted Him and He has made Him known].
That tells us? Without Jesus? We could have no Word of God to be discussing right now. For the Word of God was written for human consumption. Written with words that human souls can relate to! Jesus being both Soul and God can perfectly understand and make God known to us on our level of comprehension.