For adults today, the Church, after the Second Vatican Council, has
restored the order of the Catechumenate in the Rite of Christian
Initiation of Adults (RCIA). It outlines the steps for the formation of
catechumens, bringing their conversion to the faith to a greater
maturity. It helps them respond more deeply to God's gracious initiative
in their lives and prepares them for union with the Church community.
This process is meant to form them into the fullness of the Christian
life and to become disciples of Jesus, their teacher. This includes an
initiation into the mystery of salvation, the practice of faith, hope,
and love, and other virtues in a succession of liturgical rites. - usccb.org