3. How do I relate to sin after becoming a Christian?

James 4:7 Submit yourselves, then, to God. Resist the devil, and he will flee from you.

We resist sin and temptation as a Christian and trust God to be with us and help us overcome.

I John 3:9 No one who is born of God will continue to sin, because God's seed remains in him; he cannot go on sinning, because he has been born of God.

We do not continue to sin.  We repent and turn from sin.  Run away from sin.

Ephesians 6:10-11 Finally, be strong in the Lord and in his mighty power. 11 Put on the full armor of God so that you can take your stand against the devil's schemes.

We stand against sin and for righteousness.