The bible tells us that "all" have sinned and have walked away from God and His ways. All humanity is born into this sinful nature. No one is without sin in their life.
First you admit. I admit that God has not been first place in my life and I ask Him to forgive my sins.
"If we confess our sins He's faithful and just to forgive us and cleanse us from every wrong."
The scriptures says, "If you confess that Jesus is your Lord, and you believe in your heart that God raised Him from the dead, you will be saved."
It doesn't say you might be. It doesn't say you can hope to be. It says you will.
The Bible is very clear, that God did it all for us and we had nothing to do but receive His free gift by faith in Him.
"It is by grace you are saved through faith and it is not of yourselves. It is the gift of God. Not of works so no one could boast." Eph 2:8-9