Peace jn0125,
You won't believe in the God of Israel if you become Islamic.
The God of Israel would NEVEr break His covenant with the Israel for an Ishmaelite.
Rather, God fulfilled His covenant through Jesus Christ.
The Prophecies tell us this.
Isaiah 49
5 And now the LORD says-
he who formed me in the womb to be his servant
to bring Jacob back to him
and gather Israel to himself,
for I am honored in the eyes of the LORD
and my God has been my strength-
6 he says:
"It is too small a thing for you to be my servant
to restore the tribes of Jacob
and bring back those of Israel I have kept.
I will also make you a light for the Gentiles,
that you may bring my salvation to the ends of the earth."
7 This is what the LORD says-
the Redeemer and Holy One of Israel-
to him who was despised and abhorred by the nation,
to the servant of rulers:
"Kings will see you and rise up,
princes will see and bow down,
because of the LORD , who is faithful,
the Holy One of Israel, who has chosen you."
God now offers salvation to all people and invites them into His New Covenant through Jesus Christ.
In Islam teh Holy Spirit of the LORD is an angel.
We believe He IS God based on the Bible:
Then the LORD said, "My Spirit will not contend with [1] man forever, for he is mortal [2] ; his days will be a hundred and twenty years."
-Genesis 6:4
Then the LORD came down in the cloud and spoke with him, and he took of the Spirit that was on him and put the Spirit on the seventy elders. When the Spirit rested on them, they prophesied, but they did not do so again.
-Numbers 11:25
But Moses replied, "Are you jealous for my sake? I wish that all the LORD's people were prophets and that the LORD would put his Spirit on them!"
-Numbers 11:29
Then the Spirit of the LORD came upon Jephthah. He crossed Gilead and Manasseh, passed through Mizpah of Gilead, and from there he advanced against the Ammonites.
-Judges 11:29
The Spirit of the LORD came upon him in power so that he tore the lion apart with his bare hands as he might have torn a young goat. But he told neither his father nor his mother what he had done.
-Judges 14:6
The Spirit of the LORD will come upon you in power, and you will prophesy with them; and you will be changed into a different person.
-I Samuel 10:6
2Suddenly a sound like the blowing of a violent wind came from heaven and filled the whole house where they were sitting. 3They saw what seemed to be tongues of fire that separated and came to rest on each of them. 4All of them were filled with the Holy Spirit and began to speak in other tongues[1] as the Spirit enabled them.
-Acts 2:2-4
Obviously, the Spirit of the Lord is the Lord manifested as the Spirit, and not some angel.
There's the Holy Spirit.
Islam tells lies because it denies Jesus as the Lord and Saviour, the Holy One of Israel who ussured in God's New Covenant to offer salvation to all people.
Islam lies about the Holy Spirit, among many other things.
The purpose of that faith is to keep you away from Christainity.
We also believe in ONE God, and He is purely heavenly, immanent with us in Spirit, and able to walk among us as a men.
This is the Father, Spirit, and the Son.
If you choose to become a Muslim than you would have rejected the God of the Bible, so you reject God for another god; the god of the Quran who is obviously different from the God of the Bible.
You cannot have a personal relationship with God as in Christianity.
You won't be assured full salvation in Islam, like you are in Christianity.
Among other things too, but your religion is your choice.
May God bless you and help you find your life religion.
It's a big decision that will determine where you will end up after you doe, so choose wisely.