I recommend you get more into the word of God, try reading the book of Proverbs where you can gain so much wisdom and may be able to understand more clearly what God expect of you.
Lord direct this person more into your word and give them the understanding needed in order for them to be at peace with you and them self. Let them see there is no special way to pray, but to just have a sincere conversation with you from the heart, for you are our best friend and Savior. In Jesus name amen.