The nice thing is you look pretty young already, so HRT effects will be more pronounced.. given time and testosterone influences though the masculinization effects will continue to worsen things.
Most people I find if you don't act like a cat with a long tail in a room full of rocking chairs, (don't act like you don't belong, super nervous, etc..) generally you do fine. Act like you belong, improve your voice, and 'monkey see monkey do' act like females your age, copy their mannerisms, etc.