try and masculinize your proportions as much as possible. aim for clothing that makes your shoulders look bigger, waist smaller, etc. try to look taller a good way to subtly do this is platform converse and longer pants/shorter top. idk if ur gay but acting like a twink can help too. lastly a hairstyle that masculinzes the face while hiding the feminine qualities. at the end of the day though dress for u not to pass.