Should I become a catholic?

Personally as a Catholic, I would encourage you to become a Catholic. However, don't be discouraged if becoming Catholic is hard. Through God you will have strength. And about becoming Catholic, I would go to church with a friend and talk to a priest. On the subject of your father, I would tell him about your wanting to be Catholic. If he doesn't take it well, I would bring up freedom of religion and do what you believe is right. Don't let your father be discouraging. God Bless You!