Just ask the Lord to save you. Tell him that you believe that he is the Son of God. It's as simple as that.
Romans 10:10 For with the heart man believeth unto righteousness; and with the mouth confession is made unto salvation.
Romans 10:13 For whosoever shall call upon the name of the Lord shall be saved.
Isaiah 1:18 Come now, and let us reason together, saith the LORD: though your sins be as scarlet, they shall be as white as snow; though they be red like crimson, they shall be as wool.
1John 1:9 If we confess our sins, he is faithful and just to forgive us our sins, and to cleanse us from all unrighteousness.