Do you want to go to confession, but do you know that you can not tell all about your sins to the priest? Will you then forgive sins - even those that are called? If, for example, you want to repent of the sin of smoking, and then again smoke, will this sin be forgiven?
If there are sins that you are ashamed of and difficult to talk about, strengthen yourself by believing that confession is to the Lord Jesus Christ Himself, and the priest is only a witness. Perhaps you are ashamed of a familiar priest. Then go to the temple, which is away from your place of residence, where no one knows you. Sins that you will not name will not be forgiven, and confession will be incomplete. And God must be loved with all his heart, not with a part of his soul, in loving God, and with the other part being given to passions.
If you smoke and are not sure what you can give up the first time, you should still repent of this sin, but on condition that you struggle with this habit: after confession and communion, do not smoke immediately, but will tolerate as much as you can. The main thing - after confession, change the direction of your life from serving yourself to serving the Lord, who said: "Seek first the Kingdom of God and his righteousness, and the rest will be added to you."