The steps to priesthood:
The first requirement to become a priest is that one must be male and unmarried. There are actually a few married priests, who were formerly Episcopalian ministers who converted to Catholicism. Because they were previously married, they were not asked to take the vow of chastity. However this is a very rare exception, and normally a married man would not be allowed as a candidate for the priesthood. A married man may become a church deacon and so help the church, but he is often required to promise not to remarry should his wife predecease him.
After determining one might like to become a priest one either joins a seminary after high school, or goes to college. A college degree could be in liberal arts or religious studies. Classes emphasizing public speaking and writing are helpful. One can study at either or secular or a religious college. Attending a Catholic college is encouraged since it is thought the college will give the potential priest more access to other priests and opportunities for service in the church.
Finally, you take an ass-whipping from a middle aged woman and receive you vestments.