Whoah! Secular Orders are not for people who cannot enter a religious order. Secular Orders are part of religious families. They are a calling of their own. The Church recognizes them as a separate calling from the conventual life. But they are called to live the evangelical councils, the Gospel and the rule of their founder. They have a ministry in the Church, their own spirituality, their own canonical superiors, fraternities and some even live in common community houses. Some members are celibate. Some are deacons, priests, bishops and even popes. John XXIII was a Secular Franciscan. I believe that John Paul II was a Carmelite. St. Pius X was also a Secular Franciscan.
Every secular order falls under the authority of the Sacred Congregation for Institutes of Consecrated Life and Societies of Apostolic Life. They are considered Institutes of Consecrated Life and public associations of the faithful. Their profession is a liturgical action that is binding until death under the pain of serious sin if they violate it. The larger Secular Orders: Franciscans, Dominicans, Carmelites and Oblates, each have a superior general in Rome who answers to the Holy Father like any other order. Many of these orders have given birth to hundreds of congregations.
My own congreation was founded by four Secular Franciscans who wanted to live the conventual life following the rule of St. Francis for the Brothers and Sisters of Penance. The TOR friars who run Franciscan University are part of the Third Order. Hence their initials after their name. But they are real friars. The Friars on EWTN are part of the Third Order of St. Francis. But they are real friars. Some third order members are friars, sisters, diocesan clerics or married men and women. But they all follow the same rule of life and form one family. This is true of the Dominicans, Carmelites and Benedictines.
Be careful. To be a member of a Third Order you must have a calling to that life.
Fraternally,
Br. JR, OSF
PS. Our OSF stands for Brothers of Life of the Order of St. Francis. We are friars, but we were founded by Secular Franciscans and Capuchin Friars who joined to start a new order.