So it is like confessing our sin to Police (Priest) and it is upto the Judge (God) to make the Judgment? I haven't seen the practice here, i hope we confession our Sin to Jesus instead with any human being
Not really - what you're describing implies that we confess what we did and then receive a punishment. Scripture tells us clearly that if we confess our sin God will forgive us. Jesus already took the punishment so we don't have to. It's not really like confessing to a police-like figure in the hope of getting a more lenient punishment, it's about admitting we did wrong so we can be forgiven.
To be forgiven we have to confess to God. When we confess we are forgiven, which means we don't have to face any spiritual punishment. We may still have to face a secular punishment, depending on just what we did. To take an example, if we are guilty of theft God will forgive us but the secular courts may still punish us. We can't really claim to be truly sorry for our theft unless we are willing to make amends, and those amends may include a secular punishment, secular restitution (e.g. returning what we stole) or similar.
The idea of confessing our sins to each other isn't so that some other person can forgive us. An individual has the right to forgive sins committed against them but has no right to forgive sins committed against someone else. The idea of confessing to someone else is so that we can support each other. If you confess your sin to me perhaps I can help hold you accountable, or pray for you, or whatever else. Perhaps you meet with a couple of other guys you trust on a regular basis and hold each other accountable, discussing how you've resisted temptations, how you might have struggled with it, maybe tripped and fallen again or whatever else. But that's a very different proposition from going into a tiny little cubicle to talk to a priest to talk about what you've done wrong.