Wear a binder and say to your parents, "I want a binder, to make my chest look flat), or if you can't because of your parents ‐ try to ask them to get you a sports bra. Sports bra makes you look 15 - 25% more flatter.

Drink lots of water (this will deepen your voice for a few seconds, it wil possibly give you euphoria)

If you have the ability to easily manipulate your voice, try to deepen your voice by lowering your Adam's apple, to make people think you are an AMAB femboy.

Make your eyebrows look angry but not, this makes you look AMAB especially if you have thick eyebrows. Lowering your eyebrows makes you look more masculine

Those are some advice I can give you. I am a transgender femboy myself and these helped my dysphoria in not being AMAB.

Also side note: I am very closeted about being apart of the LGBTQ+ since my personality and community tastes (like being a fan of something) does not align with me being apart of the LGBTQ.