How do you tell your parents you want to convert to Catholicism?

I have been going to Catholic school for over a year now. At first I wasn't sure if I would like because my family has never been deeply rooted in Christian faith, Catholic or other wise. However, after the first M (they are mandatory every Tuesday) I felt God's presence within me like never before. After being there and learning more about Catholicism, prayer, and faith I felt closer to God, more happy, and more alive than ever before. After a year of going to M every week, I feel like I'm distancing myself from God during the summer. My father doesn't believe in religion, especially not Christianity. My mother doesn't believe in Sacraments. My siblings...I don't want to get into that. Anyway, how do I tell my parents I want to become Catholic, or at least attend M every Sunday?