These library priorities are based on my years spent on RCIA and SCC teams;
with the understanding you have a Bible (although I suggest a good study Bible like the NAB or Navarre).
1- Catholic Catechism
2- Lives of Saints (Roman list or US)
3-Delaney's Lives of Saints everyday
4-Daily devotions Pope St John Paul II Devotions
5-Divine Office the Brevary of Catholic Prayers should suffice until you're motivated to buy the Liturgy of the Hours
6-A Book of Catholic Prayers--my favorite is St Joseph c 1958
7-Missals, both Sunday and weekday--these will encourage you to go to Mass to here how the priest explains the readings
8-History of Church--McSorley's is the best I've found
9-A few biographies of Saints, preferrably patrons for yourself and family, and others with whom you feel special communion.
10-Life of Jesus Christ--Pope Benedict's was difficult for me, but fascinating. You have many options.