How old were you when you realized you were transgender?
24. I feel so bad that it took me so long to realize, especially when I was so close at 18. Don't believe the narrative that all trans people knew since they were small children. As Ms Clones said, it can take a while to sort out why you are feeling a certain way.
When I was too young to know what body part made you a boy, I had insisted that I was a girl. How to behave as a boy was beaten into me by the time I was six. So I knew something was amiss at age four, at least. Didn't know the name for it for sometime later.
The world really started going wonky for me around age 11 and it took me a couple decades to really sort out why and accept it. You have to remember things were MUCH different back in the 70's. .