I have a similar experience, in that I crossdressed as a kid, and came out as agender before working out I was a trans woman at about 25-ish (ironically, one of the reasons I worked it out was because someone on an online forum assumed I was assigned female at birth, and tried misgendering me with she/her pronouns when I asked people to use they/them).
Speaking of, I've just had my oestrogen bumped up to 8mg a day from 6mg a few days ago, and I can't describe how, but I feel amazing!