I've been out to my mother as genderqueer/FTM femme for about 3 months and we've been talking about it quite a lot, but she still refuses to use my preferred pronouns.
In our last talk, I finally set it as a boundary for me.
"I can tell you're trying to help me, and that you're trying to understand and that's awesome. But if you want to help me, this is how to do it. I really do need you to call me by either "he" or "they". It's not just a want, it's a need".