He had been noticing something is up with me lately, as I have been talking in a higher pitch voice and been talking about gender a lot. He lectured me (as big brothers do) while we were alone skiing to not let anyone pressure me for answers, as he had felt family was grilling me on gender questions during thanksgiving dinner. I told him I didn't feel pressured, especially by him, and told him that I have started HRT! He said he supports me no matter what, and asked me if I wanted him to use different pronouns or name! Feels good to have a supportive brother, since the rest of the family won't support me!
