how to be more neutral/masculine?

it really doesn’t help that im short, overweight and poor. in this picture my boobs are barely visible because of bad posture (really hard to keep because i automatically switch to correct posture as soon as i start walking) and good angle. and how to train voice to have more variety? i currently sound like a pro tiktok fortnite player but because i go everywhere alone, everyone assumes im an adult woman. i only want to be an adult woman legally. in real life, i want to be as neutral as possible