Desideraht
I have personally met several people who started transitioning and changed their minds. I met a former MtF who stopped his transition, went back to male pronouns and lives as an androgyne. I also have met like half a dozen former FtMs who went COMPLETELY back to female, almost hyper-feminine, showing off their boobs and wearing make up and s**t, being extremely "cutesy" and usually a nerd's wet dream.
Basically anyone who wants to go, "I'm trans!" and a week later get on hormones, is a stupid person. Maybe therapy isn't what they need but they need to ******** think. it's permanent and there are a lot of feelings going on. For instance, someone I will not name, is very sexist, and hates women. I kind of think his transition is based on misogyny mostly. I'm not allowed to argue this, however, because it makes me "transphobic".
The biggest concern with your friend at this point is she needs an endo to make sure her levels are correct. If someone doesn't seen an endo, they are shooting themselves in the a**. If your levels are wrong, your transition won't work, or it will work very slowly. Estrogen and testosterone are analogous chemicals. Too much of one makes it TURN INTO the other, as your body tries to balance out. It tries to compensate. So an FtM overdosing could, for instance, cause his breasts to grow.
The issue with my partner is extremely vague. He won't ******** tell me anything. Like I don't know if he's "scared". He pretends to be confident but his actions make it seem like all he ever wants to do is read Reddit, look at porn, and play League of Legends for the rest of his life. Since that's basically all he does. Then when we're together he just pries me for sex. He has no respect. When I'm trying to sleep he rams his d**k on my a**. I'm so tired of his juvenile behavior. I've talked to him about this at least a dozen times. I've already told him this s**t over and over, but he does this annoying thing where he's like "ok, love you!" and acts like we're still together. THEN if I say, "no, ******** you, it's over," he's like "ok, if that's what you WANT..." and pretends not to care. It pisses me off, and makes me want to kick his a**. He uses all sorts of bullshit manipulative ways to keep me around. Then when I am literally walking out, packing his things to give to him, etc. he acts all suicidal. I don't know what the ******** to do honestly.
Also as for Etsy he has no craft skills whatsoever.
I've met only one person who reverted, he was a gay guy who thought he had to be a woman to be with men. Eventually he got over his internalized homophobia though and reverted.
Takes a few months for HRT's changes to be permanent, at least for E. Even the first permanent changes rarely push someone out of the realm of their birth sex.
I've never heard of estrogen becoming T, only the other way around. If it is possible someone must be taking massive amounts of it, because I've talked to people who's levels were 3 times higher (around 2100) on their estrogen but fine on T... then again AAs will stop T from working in your system anyways. Bloodwork is important though, as the amount of medication someone needs can change. I take less than 1/4 of what other transwomen take but my estrogen count is in the normal female range.
Distance yourself from him, just don't hangout with him, return calls or emails. He will eventually figure it out.