Revelation 1:5 (NKJV) and from Jesus Christ, the faithful witness, the firstborn from the dead, and the ruler over the kings of the earth. To Him who loved us and washed us from our sins in His own blood,
Acts 22:16 (NKJV) And now why are you waiting? Arise and be baptized, and wash away your sins, calling on the name of the Lord.'
so if the blood of Christ is what washes away our sins (Rev 1:5) and Ananias told Paul to be "baptized, and wash away your sins" and Paul "believed" since the road to Damascus, then "belief" alone did not remit his sins, it was baptism administered by a disciple of Christ, and since Christ is the only one that can baptize with HS, yet the disciples were commissioned to make more disciples "baptizing them" Matt 28:19 (notice again Matt 28:19 does not say "go, I will make more disciples, I will baptize them")
It was when Paul was water baptized that his sins were remitted (just like Peter said in Acts 2:38)
Your theology has sinners in a save position.