"Holy Baptism is the basis of the whole Christian life, the gateway to life in the Spirit (vitae spiritualis ianua), and the door which gives access to the other sacraments. Through Baptism we are freed from sin and reborn as sons of God; we become members of Christ, are incorporated into the Church and made sharers in her mission: 'Baptism is the sacrament of regeneration through water in the word.' This sacrament is called Baptism, after the central rite by which it is carried out: to baptize (Greek Baptizein) means to 'plunge' or 'immerse'; the 'plunge' into the water symbolizes the catechumen's burial into Christ's death, from which he rises up by resurrection with him, as 'a new creature.' This sacrament is called "the washing of regeneration and renewal by the Holy Spirit,' for it signifies and actually brings about the birth of water and the Spirit without which no one 'can enter the kingdom of God.'"- (CCC 1213-1215)
Information on Baptism for those 6 years and younger click here
Those who are older than 7 but younger than 18 need to attend Special Sacramental Classes. For more information click here
Those older than 18 need to attend OCIA (Order of Christian Initiation of Adult). For more information click here