Hey, Vanessa, dont stress about your shoulders and dont get fixed on one feature of your body as a major of deterrant for your transition. When all things went down for me and I started to look at transition as quite realistic possibility - instead of something which is done by those younger and luckier than me - I was pretty much depressed about everything: my face, my shoulders, my arms etc. It all sorted out eventually and mostly for good. My shoulders are now 17' which is acceptable for a wide shouldered woman – I might loose another inch and then that is pretty much all. But now I dont care anymore – my ex – she had shoulders wider than her hips, btw. Of course, her frame is quite subtle and petite, but I have seen and met attractive women who have large frame and wide shoulders and they dont give a damn about that. Wide shoulders – that is also an extra safety, because a possible assailant will think twice when picking out a victim, because broad shouldered girl can put up more resistance. So, take it easy and start seeing into Your therapy options

Take care and be safe!
Yeah, and another thing Vanessa - good luck in Your journey