I am not trans just so you know, on the other hand I don't feel strongly about my gender, um I just mentioned that cause while reading about trans people there were some mentioning that gender is something important in their life which makes sense of course since they want to transition, so while I am rather whatever on my gender I do not feel need to connect with or explore my gender.
And since that is kind of my background and I am coming from religious country/community I only find out about LGBTQ+ from the internet (interent has its pros).
About hormones, especially when people are not adults yet, it might seem like a good idea to go on hormons before secondary gender characteristics come in so that will mean less adjustng later in life, but since tranisitioning has been more regulated and accepted in last 2-3 decades there are more information and research on long term consequences of various treatments.
Here is some hormone not-trans related stuff-it has been found that men who used certain female creams like product for skin were infertile while using it cause creams contained some levels of estrogen/female hormone(it makes skin softer and more elastic) that got into their system and was keeping them infertile for some reason-once they stopped using cream they were able to go back to baby making with their parnters as originally planned.
Hashimoto dieasase-whitecells attack thyroid gland and that gland produces and regulates many hormones(most notably ones responsible for growth and day/night cycle aka sleeping so they have trouble sleeping) so people with it have their hormones out of whack unless they get hormones through mediaction.
Maybe not well known, but all humans produce both testosterone and estrogen, just in different quanities, and at 45-55 humans start producing less of those hormones which does mean they age faster and are more fragile, have bodily functions mildy disrupted cause those hormon levels dropped-it is considered safe to give replacement hormones if persons wants of needs.
Birth control pill and after morning pill (they are not the same thing and neither aborts a maybe-baby-or fetus or baby? however you classify it, not the topic here-I needed to mention cause some people don't know the difference and see both as evil killing of life :/ when that's not the case) they both contain hormones to regulate body's hormone levels-most notably they lower estrogen levels in females so ovulation is less likely to happen therefore if there is no cell for sperm to meet there will be no baby after the deed is done. P.S. both cell and sperm can live in female body for a few days, not to mention a female body can release 2 cells at the time.
Stress affect hormone leves too-it is leading cause of infertility.
Sports and trans-it can be a mess and there have been cases of inclusion and prohibition-I think latest news is that those who allowed went back on that idea after seeing some results, concluding that being on hormones for 1 year is not enough to level playing fields-this is bit off topic but just mention how hormones are not alpha and omega of what body is like and how it matters at what ages what hormones play the part. And I am not really a sports person, I think althetes are amazing no matter what they achieve thou they always go for 1st place of course, competitive spirits, and fact is that even within same sex category bodies vary and some have natural advantage over others, but it seems those things are allowed, while trans situation is different, their bodies are different, but it seems like it is found they are too different for some sports or something. I have no knowledge to make a final judgement on the matter ;-; I just feel bad for both sides cause one feels like situation is unfair and other well, they like sport and why should they give up on professional levels for being who they are.
So there, examples of how hormones are not something new and unexplored, but at the same time still mysterious and they can affect bodies short and long term, make sure to have mutiple credible sources and experiences of others before taking them-and don't buy sketchy stuff from internet, get them from pharmacy.
And I do not wish to scare you or deter you if you are trans, but I feel a need to ask to you please check out YoutTube channels or forum threads with detransitioners which is a term for people who started to transition to gender they felt as or were told they should feel like, but somewhere along the way they realized they did not actually want this and wish to return to gender they were assigned originally/at birth based on physical attributes. Their situations are complicated and maybe not at all like yours, but I think it would be worth watching/reading about especially if you want to do some more serious surgeries later on-I knoww people don't jump into surgeries to change their private bits right off the bat as they transition and that some don't feel need to change that at all, that different trans people do different things to feel like correct gender-pronouns, name, clothing, bobs, training to gain muscle or eating more to lose it, voice changer, some facial adjusting.
WP is LGBTQ+ supportive from what I've seen, they helped me learn and there are arts during and outside of pride month and people posting their pronous and orientation and if they are trans- it is still internet so you can't trust everything 100% but I've never seen bullying or discrimination on that basis so yeah, this is one of good places to ask and be no matter what :3