Even before I hit my 46th, I knew that I wanted to... But that said, I knew I needed to seek out a therapist. After months thinking about it, I booked my first therapy session last December. I've began electrolysis on my facial hair, and see an endocrinologist later this week. I just feel this is the right time, I could have and considered transitioning in my mid-20s but just wasn't ready for it. At that point I had a lot of self-loathing towards myself and the idea of transgender people in general. At the time I though that anyone who was transgender were delusional, and yet here I was seriously considering it.
For some strange reason, I think I genetically pre-disposed to being female. Maybe it has to do my lack of upper body strength, my sparse and thin facial and body hair, and late development into what I have now. My facial and body hair didn't grow in until my early 30's.