Yes,keep it secret. It always amuses me when I hear a Catholic say that he/she does not believe in magic; when a priest uses magic every morning at Mass. I was brought up a Catholic, went to a Catholic school. At the same time I was learning witchcraft. Very often I would see a devout Catholic go into church,buy a small candle, light it from the other candles on the rack; and then kneel to say a prayer to God, or a Saint.
They have just cast a spell!