It is 100% our decision to accept or reject the Lord Jesus Christ. If this was false, there would be no sin.
It's not our decision to accept Jesus. Because man is sinful, his will is broken, sinful, fallen. As we read in Scripture, we did not choose Him, He chose us (John 15:16), and elsewhere that we "who were born, not of blood nor of the will of the flesh nor of the will of man, but of God." (John 1:13). Since the heart of man is sinful and sick (Jeremiah 17:9), because "All have sinned and fallen short of the glory of God." (Romans 3:23) we can be certain that the flesh accomplishes nothing. For, in fact, we were "dead in our trespasses" (Ephesians 2:1) and thus "For by grace you have been saved, through faith, and this is not of yourselves, it is the gift of God, not by works so that no one may boast." (Ephesians 2:8-9).
So salvation is God's gracious work, not a human work. Our salvation was not our choice, but God's gracious work and act.
I assume you know this as a Christian yourself. God does not come down; the Holy Spirit is already here in our hearts.
God does come down. If He didn't, then we would be hopelessly lost; but God in His kindness always comes down. God came down, for we read that the Word became flesh and dwelt among us (John 1:14), our Lord Jesus Christ is God come down. God came down on Pentecost, just as was promised in ancient times, "And it shall come to pass afterward, that I will pour out my Spirit on all flesh; your sons and your daughters shall prophesy, your old men shall dream dreams, and your young men shall see visions." (Joel 2:28), and as St. John the Baptist had said, "I baptize you with water for repentance, but he who is coming after me is mightier than I, whose sandals I am not worthy to carry. He will baptize you with the Holy Spirit and fire." (Matthew 3:11), and our Lord Jesus Himself said, "And I will ask the Father, and he will give you another Helper, to be with you forever," (John 14:16) "And while staying with them he ordered them not to depart from Jerusalem, but to wait for the promise of the Father, which, he said, 'you heard from me; for John baptized with water, but you will be baptized with the Holy Spirit not many days from now.'" (Acts of the Apostles 1:4-5).
God comes down in His word, for the Gospel "is the power of God to save all who believe, the Jew first and also the Gentile, for through it the justice of God is revealed from faith to faith, just as it is written, 'the just shall live by faith'" (Romans 1:16-17), and also that Christ has sanctified and cleansed His Church through the washing of water by the word (Ephesians 5:26). And He comes down in Baptism, for here "All of you who have been baptized into Christ have put on Christ" (Galatians 3:27), for we have been given here in Baptism a spiritual circumcision made without hands, "In him also you were circumcised with a circumcision made without hands, by putting off the body of the flesh, by the circumcision of Christ, having been buried with him in baptism, in which you were also raised with him through faith in the powerful working of God, who raised him from the dead. And you, who were dead in your trespasses and the uncircumcision of your flesh, God made alive together with him, having forgiven us all our trespasses," (Colossians 2:11-13). It is God who comes down in the Eucharist, for here is Christ's own very flesh and blood, even as He declared and promised, "For I received from the Lord what I also delivered to you, that the Lord Jesus on the night when he was betrayed took bread, and when he had given thanks, he broke it, and said, 'This is my body, which is for you. Do this in remembrance of me.' In the same way also he took the cup, after supper, saying, 'This cup is the new covenant in my blood. Do this, as often as you drink it, in remembrance of me.' For as often as you eat this bread and drink the cup, you proclaim the Lord's death until he comes." (1 Corinthians 11:23-26) for says St. Paul, "The cup of blessing that we bless, is it not a participation in the blood of Christ? The bread that we break, is it not a participation in the body of Christ?" (1 Corinthians 10:16).
Time and again, it is God who comes down. It is God who comes down in the Incarnation. It is God who comes down in the pouring out of the Spirit on all flesh. It is God who comes down in His Word and Sacraments. It is God who creates faith (Romans 10:17), and gives faith (Ephesians 2:8) and works in us the working of salvation, through the Holy Spirit. It is God who does these things.
We don't go up.
God comes down.
Holy Spirit baptism does not occur until a person has decided to believe and accept Him.
Baptism with the Holy Spirit, biblically, refers to the outpouring of the Spirit on all flesh, which we see having happened on Pentecost as recorded in the 2nd chapter of the Acts of the Apostles. In a secondary way we see a kind of second Pentecost with God's sign that the Gentiles were to be included, as recorded in the 10th and 11th chapters of the Acts.
There's literally no where in Scripture which even so much suggests that baptism with the Holy Spirit "occurs when a person has decided to believe and accept" Jesus. That's simply not found anywhere in Scripture.
Sacraments are just symbolic commands because we have already been saved.
That's not biblical, nor is it what the Church has ever believed. Scripture teaches that Baptism and the Eucharist are not "just symbolic commands", but rather explicitly say what they are.
Scripture teaches us what Baptism is in John 3:5, Acts of the Apostles 2:38-39, Romans 6:3-4, Galatians 3:27, Colossians 2:11-13, Titus 3:5, 1 Peter 3:21 to just name a few.
Scripture teaches us what the Eucharist is in Matthew 26:26-28, Mark 14:22-24, Luke 22:19-20, John 6:48-59, 1 Corinthians 10:16-18, 1 Corinthians 11:23-26
None of those passages teach that the Sacraments are "symbolic", they teach us quite explicitly what Baptism and the Eucharist actually are. Not symbols, but divine works of God which actually are what they claim to be.
-CryptoLutheran