You can't believe in the Father just as The Son accused the Jews:
John 8:
42 Therefore Yeshua said to them, “If God were your father, you would love me,
for I came out and have come from God. For I have not come of myself, but he sent me.
As I told, you got things very wrong which jeopardizes your salvation. The natural is first for God's people and not for Messiah. He is YHWH from heaven came in flesh:
1Cor 15:
46 The spiritual, however, was not first, but the natural, and afterward the spiritual.
47 The first man was of the earth, earthy;
the second Man is the Master from heaven.
The first man had no choice as also all of mankind are born flesh. But Messiah (YHWH) from heaven had a choice and He chose to come as the Seed of Abraham:
Heb 2:
11 For
both he who sanctifies and those who are sanctified are all from one, for which cause he is not ashamed to call them brothers,
14 Since then the children (
of Abraham) have shared in flesh and blood,
he also himself in the same way partook of the same, that through death he might bring to nothing him who had the power of death, that is, the devil,
16 For, doubtless,
He does not take hold of messengers, but He does take hold of the seed of Aḇraham.
See you have to sweep these scriptures under the carpet to hold on to your false theory that He had no choice likeall human beings.
1John 4:
2 By this you know the Spirit of Elohim: Every spirit that confesses that
Yashua Messiah has come in the flesh is of Elohim,
God is revealed in two dimensions - Transcendence and Immanent creation. That's why John makes a distinction between God and WORD in the beginning. The WORD was God - in immanent creation.
John understood this as time and again he says no one has ever seen God at any time. He is referring to Transcendent God. Paul says that He is in unapproachable light Whom no one has seen nor can see. Yeshua told the Jews that they never seen His form nor heard His voice. Yet OT prophets have seen YHWH. OT scriptures also reveal YHWH in duality of powers - as invisible and also as a Man.
The NT authors also point out that Spirit of Messiah was in the OT prophets. Moses suffered with the people of God as the reproaches of Messiah - Heb 11:26.
Paul warns Corinthians not to tempt Messiah as the OT fathers did. He also told that The Rock of Israel (YHWH) followed them was Messiah.
If The Word didn't come in flesh as The Son, the Transcendent God would not be made known. If He remained as transcendent God then no one would ever know the true God. He had to make Himself The Way, The Truth and The Life in order to reveal the true God to His people. This is the thing not understood by Unitarians and JW. They believe YHWH like a Muslim Allah who has no sense of love, humility and glory - but only a god of judgement.
John 1:5:20 reveals that by the manifestation of The Son, true God is revealed and not that He is not the true God Himself.
What you read is only surface level meaning not able to discern as unto eating meat but only on milk. If Messiah is not God then the Father too is automatically rejected because He spoke as The Father in the OT. You couldn't have heard transcendent God's voice.