In addition to the good advice others have offered, you might want to check out this book:
https://www.amazon.com/dp/B004CR6ALA/
It's called "Difficult Conversations," and is basically a bunch of conversation outlines for difficult topics. I've found it very helpful.
I wish I could claim the idea, but it's lifted from the book Difficult Conversations. Fantastic read if you're feeling up for a bit of self-enrichment.