The first step to becoming a Christian is to first realize that you have sin in your life and you want to change. Second, you need to pray and ask God to forgive you and ask him for his holy spirit to live within you (a lot of people forget about this step) and then he will give his holy spirit to you to help guide you. After that, just read your bible and do your best to serve others and help them when they need help. A big part of being a Christian is about love for others and viewing others as more important than yourself.