there were many different orders, it would depend on what region in the country you are asking about.
Sisters of christian charity
Girls who were training to be nuns would be postulants when they start, and then novices. The Catholic Orders do not allow boys to be nuns or sisters.
Because you have to be either a Catholic or an Orthodox Christian to become a nun. The Jewish religion doesn't have religious orders (such as nuns and monks).
Catholic Answer:Some orders of sisters or nuns do wear a wedding band showing that they are married to Christ. Depending on the local culture, they wear it on either the left or right ring finger.
Women are taught in a special nuns' convent where they are trained to become and live like a nun.
One assumes you are referring to Catholic nuns. All are Roman catholic, but there are considerable variations in the missions, cutural aims and tolerances- the habit or religious costume, etc within the many religious orders for women. there are even variations in saints that are venerated, some operate (Out of Costume) and so on. it is difficult to generalize about nuns. Some religious orders ban pets, others tolerate them, and there are all kinds of doctrinal hair-splitting.
The Catholic Church flourished following the Council of Trent. The number of religious orders, priests, nuns, and vibrant Catholic families continued for hundreds of years until wrecked by the "spirit of Vatican II".
A prioress is woman who is head of a house of certain orders of nuns.
Roman Catholic AnswerSt. Francis de Sales and St. Jane de Chantal founded several orders of nuns doing the Counter-Reformation. St. Teresa of Avila started a reform that would result in the Discalced Carmelite Order.
Nuns do not go through Holy Orders. They take certain vows to become nuns.
It's just Catholic, not Roman Catholic. Roman is an epithet first commonly used in England after the protestant revolt to describe the Catholic Church. It is never used by the official Catholic Church. And you are probably thinking of Catholic Sisters, who taught in schools and worked in hospitals. Nuns were enclosed in monasteries and did not normally travel. Sisters did not travel alone, but normally were required by their rule to always travel in pairs.
Roman Catholic AnswerIf you are referring to the Order of the Immaculate Conception, a contemplative order of Nuns of the Catholic Church, then, yes, they are most definitely Catholic. If you are referring to a host of other things commonly called "blue nuns", then, no, they're not.
Some orders of nuns wear a wedding ring as a symbolic "marriage" to Jesus and their faith. Nuns are not God's wives.