In another thread you mentioned the desire to confess your sins. A noble thing. Confession is good for the soul. Your instinct is correct.
Here is the second part. You realize you need absolution from your sins. Merely confessing is, of course, not enough. You need contrition, a firm purpose of reform in your life, and then absolution.
If you weren't actually sorry for your sins, what good would it be to confess them? None. It would be just a show. I presume you are sorry for your sins. That's good.
The next part is a 'firm purpose of amendment'. Which means you intend real change to avoid the near occasion of sin in the future. Sure, some people are stuck in bad habits and return again and again and again to the same old sins. But we try to make progress, we intend to make progress, and we make progress, some times only bit by bit, but real progress. If a person does not intend to make change, what good is that? The intention for real change is necessary too.
Then comes the absolution from sin, the forgiveness. You get to hear the words "I forgive you." Jesus Christ forgives you. A Catholic can hear those words. So too members of the Orthodox Churches. Not that God can't say this directly to you, but physically hearing those words is a great consolation. And you are not 'too late' as long as you have breath in you.
After that, some reparations for the damage done by sin. All sins are an affront to God. All sins damage our relationship to God. And all sins damage out relationships with other people because we are communal beings. So we need to repair those wounds. It's kind of like the kid who broke the window with the baseball when he was told not to do batting practice near the house. He's sorry. He's forgiven. But the window is still broken. He needs to do something to help get the window fixed.
