The usual way is to enroll in the RCIA program at the parish of his choice. There he will meet regularly with other like minded adults who are interested in the Church and the RCIA team members, who will help guide him on his journey of faith. The RCIA will prepare him to receive the sacraments of initiation and also expose him to all the doctrines, dogmas, practices and devotions of 2000 years of the Church. It is easier and harder than it sounds!