a big reason that drove me was that I have a micropenis
Fake. There are no "reasons to drive someone" other than their internal gender, this sounds like something a cis person who thinks being trans is a choice would say.
We are born trans. The current theory is that it relates to hormonal fluctuations during critical points of fetal development, so the start is literally before you are born.
Yeah, certainly seems fake. But I can conceive of someone that's NB, fluid, or something else who is unable/unwilling to admit that to themselves or choosing to remain cis presenting for social reasons deciding to present as a woman due to a micropenis.