I came out to my little sister a couple years ago. we are very close like you and your brother and when she's home from school we're pretty much inseparable. she has gay friends so I knew she wasn't homophobic but the night I was going to come out to her I overheard heard her talking to my father telling him that she's getting tired of hanging around gay people and I didn't do it.
I introduced a whole new type of gay person to her though, her gay friends were very effeminate and gossiped a lot and I'm the complete opposite. so I finally came out to her through text after she left for college and she was shocked that her masculine, sports loving, mister fix-it big brother is gay. she text me are you serious? about five times but nothing changed between us, actually it didn't even feel weird when we hung out again. like there was no elephant in the room. its still going to be freakishly hard but if he really loves you everything will work out fine.
I introduced a whole new type of gay person to her though, her gay friends were very effeminate and gossiped a lot and I'm the complete opposite. so I finally came out to her through text after she left for college and she was shocked that her masculine, sports loving, mister fix-it big brother is gay. she text me are you serious? about five times but nothing changed between us, actually it didn't even feel weird when we hung out again. like there was no elephant in the room. its still going to be freakishly hard but if he really loves you everything will work out fine.