Yes, a few points the Dysphoria is the issue, the distress one feels because of the incongruity between body and mind, being transgender is not the disorder.
For the range of treatments, you can get a copy of the WPATH guidelines Vol 7, free online and it explains the wide varity of medical, pharmacological and surgical interventions available, along with therapy.
For what is it like for an adult, Dr Anne Vitale Ph D has a good paper online in which she discusses how GD affects MtF transgender people at various stages of life. I believe its called "Notes on Gender Role Transition based on the patients she has seen.
Good luck on the paper.