The only thing your child needs if they have gender dysphoria is love and support. Period. If they are asking for a name change or pronoun change, listen to them. If they are asking for hormone blockers or hormones and that scares you, get therapy. Actually get therapy with a therapist knowledgeable about LGBT issues anyway, because you need someone to keep you from inadvertently traumatizing your child.

This isn’t a dig at you, this is true of any parent of a trans kid. I am that kid ~25 years down the road and I am legitimately lucky to be alive after dealing with gender dysphoria by myself and surviving a suicide attempt as a teen.

I encourage you to read this Scientific American article that goes into detail on all the evidence about what support (or lack of it) does for trans youth.