Hey Maddie,
The initial phases of transition require lots of guts and courage to get through, It is not an easy time. For many of us yes we dont pass, yes our voice is bad and yes we dont really have all the skills and mannerisms which lead to anyone percieving us as the Gender we are presenting as. Add to this our own level of paranoia, confidence and esteem and it can be a real scary time ... BUT you did it and no doubt the thrill and high of doing that was something you initially enjoyed. Remember that as it gets more frequent.
It is a learning curve, its a roller coaster full of emotions, one minute passing and on a high, the next minute being read and on a low. Its part of the process and self discovery of transition and those highs and lows continue until over time only the highs remain!
Going forward try and find your own level of comfortability, dont put yourself in places or situations you feel stressed in until you are fully confident of facing that challenge. Nothing is more dismaying than failure, but you havent failed ...only realized that perhaps you are not quite ready. Knowing your own weaknesses is a strength, learn from that.
As for being brave, there are people who say screw it and people who dont want to face it... live with your own level of "Braveness" and not what other people would or may do.
Proceed at your own pace, at a level your comfortable with.
Buffy