Can I worship God without Jesus?
No, you cannot have God without Jesus.
God is a Triune God (God-The Father, God-The Son, God-The Holy Spirit). Father, Spirit and Son are not 3 different Gods, but 3 personalities in One God.
No one could come to God, without the mediator Jesus. God cannot tolerate sin and we can never become sinless on our own. Our self-righteousness is like filthy rag to God.
Only by having Jesus's righteousness imputed into us, can we stand right before God.
That is why, Jesus said, "I am The Way, The Truth and The Life".
1 John 2:23 - No one who denies the Son has the Father, whoever acknowledges the Son has the Father also
John 14:6 - Jesus saith unto him, I am the way, the truth, and the life: no man cometh unto the Father, but by me.
Acts 4:12 - Neither is there salvation in any other: for there is none other name under heaven given among men, whereby we must be saved.
John 6:50- This is the bread which cometh down from heaven, that a man may eat thereof, and not die.