Congratulations! Marriage is a major step in one's life and affects the life of the parish as well.
If you aren't engaged yet, but are thinking about it, you may want to take a closer look at whether you are ready for marriage. Various books and online resources can help you make a decision. ForYourMarriage.org, an initiative of the U.S. Catholic bishops, offers a personality audit as well as "Ten Important Research Findings on Marriage and Choosing a Marriage Partner," along with other tools (see links below, under "For more information").
The Church presumes that baptized Catholics have a right to receive the sacraments, unless there is something that would prevent them from doing so (an "impediment"). If one of you is Catholic and this is the first time both of you will be married, then it is very likely that you can be married in the Catholic Church.
The couple must normally receive six months of preparation in advance. The groom and/or bride must be registered, worshipping parishioners or have family ties to the parish if living elsewhere. Please speak with the priest at least six months before setting a date.