Knowing about transition earlier would have had positives and negatives. On the negative side, I didn't have a lot of confidence as a teen and was dealing with so many other issues, and in a way, not knowing I could transition made it easier. As much as I felt bad about being female, I didn't think there was anything I could do, so I put my energy into other areas.
It would have been positive though because I'd have been able to go into uni as a guy. I probably also would have grown taller on T and had more pronounced changes if I started it younger. I imagine I'd have had all my surgeries by now.