Baptism, the Eucharist, and the sacrament of Confirmation together constitute the "sacraments of Christian initiation, whose unity must be safeguarded. It must be explained to the faithful that the reception of the sacrament of Confirmation is necessary for the completion of baptismal grace. Catechism of the Catholic Church 1285

The preparation for the Sacrament of Confirmation is done as a class during 5th & 6th grade. The Sacrament of Confirmation can be sought through the OCIA process for those over 18, or through another preparation process.