
One of the biggest things for me before i started T and had a well binding binder (I have D cups) was paying attention to how cis men compose themselves in casual situations, and mimicking them. Like how they stand, how they walk, talk, wear their outfits, etc. people very quickly started assuming I was just a short dude with a high pitched voice. Being fat probably did help in my case though because fatter men typically tend to just be more curvy/ bigger chested already