Hi hiddengirlshelia
HRT effects vary hugely depending on several factors, age, health ,diet etc etc. Potentially HRT can do many things like thin out body hair, thicken the hair on your head, deepen voice(Testosterone FTM) , redistribution of body fat patterns, breast growth, facial changes vary so much that it is hard to describe...my face rounded out a bit but I have difficulty seeing the difference however other around me can see it better than I can. psychological changes, many experience relief from GD and that varies from a lot to nothing. There are many effects of HRT and you may get some of them, you may get all of them and have a fabulous result or you may get very little to no result at all. There are women on here who have been on HRT for a long time and have had not real physical effects at all.
From what I see everyone is so different but as a general rule the younger you are able to start then the better effect they will likly have as there is less time for the testosterone to do its thing but even at my age I still have had a good outcome.
I would suggest you read a few of the posts within this forum for a better overall guide to what you can expect.
Hope that helps a bit
Take care
Liz