Resources for parenting a nonbinary teen?

My teen has been leaning nonbinary through adolescence and recently came out explicitly to my spouse and I. We've always been allies and queer-affirming, but my spouse seems to be struggling with having a child who is not cis — not opposed, just lost. And I have to acknowledge that I am probably ignorant of the issues a young nonbinary person might face.

I don't want to just be "good enough". I want to be supportive to my child. Are there any good resources for parents in this situation? Places to read about the struggles and experiences they are going to face?