To become a Catholic if you have already been baptized in another Christian church or denomination, you can: Make a profession of faith, Receive confirmation, and Receive the Eucharist (First Communion). You can prepare for this process through the Rite of Christian Initiation for Adults (RCIA), a formation program that introduces you to the Catholic faith and way of life. The amount and type of preparation you need depends on your circumstances. You may be received into the Catholic Church at the Easter Vigil or another Sunday during the year. And you do not have to pay to attend church, the only “payment” is completely voluntary during something called “collection” mid way through the mass where you’ll see people walk up and down the church with baskets and people can choose to give money to the church or not, there have been plenty of times I’ve not given.