Basically if its earlier treated it might be of advantage... because the influence of the wrong hormones might possibly be stopped for example with blockers...
Its up to you but here are a few resources that might be shown:
https://www.susans.org/forums/index.php/topic,195129.msg1740788.html#msg1740788This is a letter from an accepting dad. So its from the view of a parent.
Parts of it might be shown.
Some parents have the same restraints, like he talks about: did they cause it by an upbringing...etc...
https://www.susans.org/forums/index.php/topic,194946.msg1736596.html#msg1736596There are brochures by reputable sources, for example the british NHS, showing being trans has biological connections.
Its explained with pictures. A brochure says explicitly for trans people, their families and health care staff.
If its biological its nobodys fault... and its not likely to be a phase...
Some people make a comparison with a twin... they will be like their male/female twin, with the same sense of humour...
and you might say you want to see a good gender therapist...
the gender therapist to help you along, maybe with easy reversible steps first, to help you find out how they make you feel...
so that you have someone to guide you and help you along, and no rash but appropriate steps are made.... appropriate also in your favour, so that it moves along...
you might ask at plannedparenthood or a lgbt place for counseling...
they also have email...
or look here:
https://www.susans.org/forums/index.php/topic,162888.msg1400316.html#msg1400316some people come out in a letter... or via text...
another option might be to say you want counseling, for emotional reasons (don't make something up... if you are depressed you might say so), and pick someone who has, amongst other, gender on their list... they could help with coming out...