Hello! In my mid 20's as well, 25 to be exact, started 10 months ago when I was 24 and a half (Low dose of Sublingual Estradiol/Spironolactone for the first month and standard dose onwards, added Finasteride between months 6 and 7 onwards, switched from sunblingual Estradiol pills to Estradiol Cypionate Injections month 8 onwards) but based on what I can remember by the end of the first week I first noticed some breast tenderness and nipples becoming puffy and that puffyness has stayed since getting gradually getting everso since.
The most noticible thing in the first few months was the pure joy of finally starting HRT, a placebo I guess you'd call it. Libido pretty much plummeted by the end of the first month as well as body odor. I started in late may so it was quite happy to not smell so gross while sweating in the warm weather as bleh did my sweat pre hormones smell anything but horrid >_< By the 3rd month I actually started to feel some actual breast tissues forming into a decent size lump about the size of a cherry if I had to estimate, nipple tenderness was at an all time high and then from early September to late October (Months 4-5) is when my first and only real massive growth wave of breast tissue happened so far going from just small tissue to actual forming breasts gaining about an inch.
Around that time is when I greatly noticed and increase of light blonde hairs all over my body predominantly my arms. Production down there gradually lowered after the first month leading to completely nothing by month 5 however after month 8th and still currently a very tiny amount of extremely thick, clear liquid seems to get produced showing about 10-20 seconds afterwards. Skin got notably softer between months 2-3 and since my switch from sublingual pills to Estradiol Cypionate injections from month 8 and on my skin feels just like a fluffy fresh marshmallow <3
Wasn't until between the 7th and 8th month that I finally was able to start seeing the physical changes I wanted the most aka facial changes as it was extremely hard to see anything which depressed me but mentally I couldn't keep pretending to be/dressing male so the day before new years I got my hair done (super scary) went straight from hiding as male to full time in a span of 2 hours and apparently I've yet to be treated as anything other then female in public and not so much as a single bad stare or misgendering in the slightest. It's certainly not perfect but where I am not I am starting to see my face as female a bit more and it's helping but whats helping more is how the public treats me and just makes me feel that I'm my own worst enemy and am seeing what no one else is and to not worry so much.
Face is pretty much completely clear, I do get a few small pimples here and there (have a big sweetooth so I assume thats the culprit) but they pretty much always go away in a few days and never large enough/enough numbers to be a problem. Complexion is pretty sucky, been cleansing/toning/moisturizing twice daily for months but still a bit of a pore problem and face is red quite often, though I live in northeast US and its damn cold and dry in winter (Used to be my favorite season and never could get cold now I freezing 24/7 and hate the damn season >_< haha) so that's mostly the culprit, I'll see come late spring/summer when its humid and warm if my face finally glows! -fingers crossed-
Body fat redistribution is something that I cant really say, when I started HRT I was 5'9 243 pounds, here 10 months later im 5'8.5 (Lost .5 an inch just got checked at the doctors early this week!) and 169 pounds and have pretty much been in a calorie deficit the entire time I've been on HRT so not sure if thats harmed the process for me. My breasts are entry level B cup though (wish they've round up though so damn hard to find a fitting bra at my band size with a cup size thats proper as they are also too big due to it being far too early on in HRT/breast growth to fill the damn things and I'm tired of sports bras T_T At least it's nice to have woman issues though! Haha) and have recently had another small surge and my butt feels a little bigger but I'm certainly disgusted by my body when I'm drying from a shower as I still feel fat, feel my shoulders are too huge, feel like my upper body isn't anywhere close to feminine despite me wearing a size M in womens tops and size 12 pants, yet I feel super tiny and feminine once I cover up my body with clothing, bleh
Lastly on the side effects side Spiro hasn't been kind to me at all, on top of the dryness (despite drinking plenty) severe constipation is an issue but worst of all the constant low blood pressure that just last week I blacked out and got a concussion, sprained wrist and all that nasty stuff, working with my doctor to hopefully find a solution but just need to hold out for 8-12 more months then SRS and ditching those awful pills for good!
Hopefully this isn't too long I just wanted to try and answer your question on a wide variety of experiences during my time on HRT!