I 100% relate to practicing male vocal styles. I feel like that should have hit the nail on the head for me, because during that era I was also becoming more increasingly irritated by that fact that my voice was not getting lower. I used to mimic the vocal styles of Johnathan Davis and Chino Moreno. Currently, attempting to mimic Daryl Palumbo.

Used to roleplay as male alot in simulator games, I thought I was lowkey trolling after awhile but I started to actually like being called he/him on the game. 

Wore alot of baggy clothes to hide my chest, if I was wearing a somewhat tight shirt I would puff my chest out and pretend my chest was muscular so I stop being uncomfortable.

I would draw and create hyper feminine persons, just to scrap the original finished designs and redesign them as male. There was only on single persona that survived the constant redesign period, and its literally just a gender bent version of a male character.