You get closer to God by reading his word and praying but what you need to do is accept Jesus as your savior and then God doesn't look at you as a sinner but as if you were His adopted son and as if you were perfect even though he knows that your not but that doesn't give us an excuse to sin.
Forget about the world. For one day, be by yourself where nothing temts you. Go to the park sit and think about what is right and what is wrong. Look around and look at all good things God has made and has done for you. Start small. Just remember that ever thing you do in life is your choices for your own life. And if Hell is as bad as they say it is try to do good everyday like if You die at night you wouldn't want to go there tomorrow.
Talk to you're heavenly father ask for guidance but seek him whole hearted. Just as you know you're doing things wrong shows you that you are crying out for help... God is a merciful God and there is nothing he can't forgive if you repent with your heart and turn away from it. We all have that gift of knowledge where we know what's right from wrong. Sometimes it's easy to do the bad things and difficult to do the right things. But if you truly believe God is you're savior and died on that cross for our sins , you may developed a relationship talking to him... Praying.... Fasting and seeking a bible based church that can help you. And join in hand in hand in prayers .. God bless
After you have prayed for God to forgive you and help you stop sinning, go to a christian friend or pastor or teacher and ask them to pray with you and be accountable to them when you are weak. We all need accountability