Reddit mentions of What Do You Mean, You Can't Eat in My Home?: A Guide to How Newly Observant Jews and Their Less Observant Relatives Can Still Get Along

This book might be helpful, especially if you aren't ready to discuss this with your rabbi yet.

It also depends on your family's attitude towards your being observant. I have heard many unfortunate, negative stories, and am grateful that my siblings are also observant, and my parents accepted our respective decisions (though they don't always agree with them). That's not to say that there aren't differences in our (my siblings and my) approaches to observance; there's always a spectrum, and sometimes that makes it even more difficult when one says something is not ok and the other says it is fine and that the first sibling is holding by a chumra.

All families have challenges. It's great that you want to be able to hold your values while not tossing away your family. However, unless you know your rabbi to be harsh/incredibly strict, most (many?) have dealt with these types of situations and can give you personal guidance in, hopefully, a compassionate manner. Good luck.

Strongly strongly recommend this book: https://www.amazon.com/What-You-Mean-Cant-Home/dp/080524221X