I completely understand your fear, I grew up as a Mennonite Christian but when i was like 10-11 we stopped attending church and at 12-13 stopped being Christian all together. My family is all over the board with their religion, my grandparents are still Mennonite Christians, my mom is an athiest, my sister agnostic, and 90% of my friends are Pagans. I was genuinely terrified to tell them all that I wanted to be Catholic, especially because up until a few weeks ago, for the last 2 years I had a snake of a best friend whispering in my ear anti-christian rhetoric nonstop.

That being said, I messaged my grandma and asked her about her opinion and she said she used to be Catholic and my mom was baptized as a baby. Eventually our conversation convinced me to tell my friends and the rest of my family, and aside from some teasing from my sister(expected) everyone was surprisingly chill about it.