There is one God. The one God exists in three persons. These persons are: The Father, The Son, and The Holy Spirit.
The Father is God, the Son is God, and the Holy Spirit is God. They are three distinct persons and yet one God. The Father, as a distinct person from the Son and the Holy Spirit, is God. The Son, as a distinct person from the Father and the Holy Spirit, is God. The Holy Spirit, as a distinct person from the Father and the Son, is God. Yet they are one God.
The Father is God, not begotten or proceeding. The Son is God, begotten of the Father, but not proceeding. The Holy Spirit is God, proceeding from the Father and the Son, but not begotten. So there is a distinction in the Godhead, between Father, Son, and Holy Spirit and yet one God.
The Father is eternal, the Son is eternal, and the Holy Spirit is eternal.
The Father is omnipotent, the Son is omnipotent, and the Holy Spirit is omnipotent.
The Father is holy, the Son is holy, and the Holy Spirit is holy.
There is one God existing in three persons.
Scripture for further study.
John 4:24; Psa. 147:5; 83:18; Heb. 3:4; Rom. 1:20; Jer. 10:10; Exod. 15:11; Isa. 6:3; 1 Pet. 1:15-16; Rev. 4:6-8; Mark 12:30; Rev. 4:11; Matt. 10:37; Jer. 2:12-13; Matt. 28:19; John 15:26; 1 Cor. 12:4-6; 1 John 5:7; John 10:30; 5:17; 14:23; 17:5, 10; Acts 5:3-4; 1 Cor. 2:10-11; Phil. 2:5-6; Eph. 2:18; 2 Cor. 13:14; Rev. 1:4-5.