The book “Rite of Christian Initiation of Adults” includes a section on “Preparation of Uncatechized Adults for Confirmation and Eucharist” (n. 400 - 410, Latin edition numbers 295-305). A few quotes:
“400. … Even though uncatechized adults have not yet heard the message of the mystery of Christ, their status differs from that of catechumens, since by baptism they have already become members of the Church and children of God.”
“401. As in the case of catechumens, the preparation of these adults requires a considerable time …”.
“402. For the most part the plan of catechesis corresponds to the one laid down for catechumens …”.
“405. The period of preparation is made holy by means of liturgical celebrations. The first of these is a rite by which the adults are welcomed into the community and acknowledge themselves to be part of it because they have been marked with the seal of baptism. [The Rite of Welcoming the Candidates … is provided for this purpose.]”
“408. … During the Lenten season penitential services should be arranged in such a way as to prepare these adults for the celebration of the sacrament of penance.”
“409. The high point of their entire formation will normally be the Easter Vigil. At that time they will make a professio nof the faith in which they were baptized, receive the sacrament of confirmation, and take part in the eucharist. …”
(The Rites Volume One, Liturgical Press, 1990, ISBN: 0-8146-6015-0, pages 245-247).