You are a Christian Theist.
‘There is one God, who may be known only through Jesus Christ’’
A Christian theist knows the triune God - One God: Father, Son and Holy Spirit. God is knowable through Jesus Christ alone, as revealed in the Bible. Jesus, the Son of God, dealt with our rebellion by his death and resurrection, reconciling to the Father all who trust him, and giving them the gift of the Holy Spirit.
It’s possible to know about all of that, and even to be able to explain it to others, but not have the reality of it hit home and capture your life. Christianity is primarily a relationship with God and His people, not just a list of beliefs.
If God is only head knowledge to you, simply put your faith in Jesus’ life, death and resurrection for you, and know the incredible freedom of the Father’s grace that sets you free to live in the power of His Spirit as a true human being should. The God who sent his Son Jesus is not someone just to know about, but Someone whom we can know personally and intimately through Jesus and the work of the Holy Spirit.
If this is a reality to you, and you know both the joy that the Gospel brings, and the call we share to proclaim Jesus to all, then devote your time, energy and resources to do just that, byt being an active member of a faithful Bible believing-and-teaching church.
‘There is one body and one Spirit—just as you were called to the one hope that belongs to your call— one Lord, one faith, one baptism, one God and Father of all, who is over all and through all and in all.’
(Paul’s letter to Ephesian Christians, 4:4-6)
‘...according to the foreknowledge of God the Father, in the sanctification of the Spirit, for obedience to Jesus Christ and for sprinkling with his blood.’
(Peter’s letter to scattered Christians, 1:2)