Why not write a book about the subject ? You might want to recruit one or two collaborators, perhaps someone from medicine or psychology -- if you know someone who is both credible and sympathetic.
Before publishing, let a wide audience of people who know a fair amount about the subject, including other TGirls, help proofread it and provide feedback to improve the content. Then publish it.
I think we need a good book on what makes TGirls tick and what their lives are like in the USA. If it's well written it could change some minds and shatter some myths.