When I was little, I didn't know I was trans and the thought never occurred to me. Regardless of the dissent between my body and mind I would not discover my discomfort with my physical body until later, as I spend my childhood a servant of my mother's whims. She was cruel, often beating and neglecting to feed me so I thought of myself mostly as an entity to serve and raise my three young siblings. After being freed from that in the midst of immense struggle, I was free to discover (at ten) that I was genuinely a person.
The realisation that I was trans was laboured more because of this and while I'd always identified casually with men, I didn't think it was allowed for me to do so. Still, I came out in the midst of depression at 16, one year after I'd discovered the truth myself. I became more open, more comfortable, and attempted to live as male since then. I started hormones at 18 and it only increased my happiness. Now, as it stands, I am 19 and ten months on testosterone. I will be getting my legal name change on the 3rd of July. I've spoken too much about my life for your constraints, but 20 years is difficult to compress when it's all the material you have to draw on. I have friends, happiness, and hope now. That, I think, it what matters.