Help! How Do I Share I've Accepted Islam with My Dad's Family, Who Are Becoming Catholic?

Salam everyone. So, my dad's family is converting to Catholicism, but I recently became a revert to Islam, Alhamdulillah. I'm honestly really nervous that I might be shunned or looked down on for being different. Any advice on telling them about my faith in a gentle, respectful way? JazakAllah Khair in advance.