I had never been taught word one, in 19 years in Catholic schools (and I got A's in all my grade school religion classes) about The Sacred Heart, the Immaculate Heart, the Miraculous Medal, the Brown Scapular, the Green Scapular, the Red Scapular, the Black Scapular, the Blue Scapular, the White Scapular, First Fridays, First Saturdays, meatless Fridays (except during Lent), veiling images, Black Fasts, Ember Days, Rogation Days, Jesse Trees, Advent Wreaths, the proper use of sacramentals, etc.
So many of us growing up in the 60's and 70's have so many gaps about the faith we were raised in. For example,as an adult, I read in a Catholic novel about how all Catholics should carry a rosary with them at all times. I was never really taught to do that.
There was so much substance that we weren't exposed to and many of us didn't know existed.
There is certainly a hidden richness in the Church!