It does not matter who we are or how often we have sinned, God can still use us as His instrument. It is not in our place to question who He uses or how.
(John 8:7; when they kept on questioning Him, He straightened up and said to them; let anyone of you who is without sin be the first to throw a stone).
Remember that whether our sins are relatively small or great, they will make us perish. God has to judge us because He is holy and He is a good judge. “good judges cannot let evildoers go free”. This shows that the Lord is Just.
At the same time it seems obvious that some sins are worse than others, in both motivation and inspiration effects, and should be judged accordingly.
In one sense all sins are equal, in that; they all separate us from God. The fact that you sin differently from someone does not make you any better in the sight of God. There is no difference between someone telling lies and someone who commits murder, know that we will be judged. (Romans 6:23; “For the wages of sin is death”)applies to all sin whether in thought, word or deed.
The good news is that Jesus paid the penalty for our sins at the cross. Free yourself from sin and accept Jesus as your Lord and saviour, turn to Him in faith and your sins will be forgiven. Eventually, we all will receive the gift of eternal life. (Continuation of Romans 6:23, “But the gift of God is eternal life in Christ Jesus our Lord “).