Muscle can be gotten rid of... it's the build due bone structure that matters a lot - that can be ameliorated somewhat with good HRT results - but can take years.
But good HRT results requires fat to be redistributed... but being heavy if one has a big build has a LOT of downsides ,even if it if does make one look less male.
Facial bone structure means a lot and and FFS can help significantly with that - though very expensive.
For those who are significantly physically challenged with respect to passing a lot has to go right with HRT, and you need to be pretty perfect with how one moves, speaks and dresses.. there is not much room for error so speak.
It can all come together .. but it's not guaranteed no matter how hard you try ... but it will never happen without working at it whole heartedly
I do know how you feel.. I have been there... Big build, ribcage shoulders , originally 6ft (i shrunk a lot because of spinal issues you don't want), originally very heavy, minimal HRT results, not a great voice don't really move femininely etc..
Going in I did not see how I could ever only be known as a woman...
When I had SRS in 98 I got breast implants even though I did not want them (I wanted it to be all "me") as on my big frame I had less breast development than some older guys I saw jogging... then a bit over a year later I had FFS...
I probably lost more weight that you now weigh, and wound up with lot of hanging loose skin. which mean I need to wear lose fitting clothes and things still don't fit right because of that...
In the end I got farther than I thought I could ... but that said even now I can't depend on not being read. It's not what I wanted, but it's what i got.
In my early days on line people who did not have my physical challenges had a problem with me saying what they were suggesting would not work ... I understood that their experience/situation was different from mine so they did not understand mine, but getting shunned did not feel good.
If being able to participate in society known only as woman matters to you, keep trying and working toward that... You are younger than I was one I started teh process. My first therapy appointment was when i was 38 IIRC...
You don't know where you will end up for sure, and I understand you may have good reason to be worried about it... But worrying won't help anything - and believe me I learned that the hard way!
So do what you can. If facial structure is an issue, if you can find a way to afford it, get FFS. Work at the non physical clues... and spend some time in places where no one knows you and interact with people .., That is the one way to get truly objective feed back on how well one is passing - though you have to look at the nuances in how people treat you as many won't outright say anything.
It may turn out that things you can change , maybe with a little surgical help, can get you where you want to be...
It's hard when we look in the mirror to see the changes and appreciate them, just is as it can be hard for people that knew us "before" to see us as women.
- Karen