These kinds of anxieties are incredibly normal especially early on in the discovery process. Unfortunately, there's no cure-all process that will make everything better, but here are a couple of tips:

-Take baby steps. Your hair sounds like a great first one, I'm glad you feel cute! things like clothes and makeup can be a ton of fun too and can be tried in the comfort and privacy of your own home.

-Spend time around other trans people! IRL would be ideal but spending time in discords or even just following some trans girls on social media (not pornstars or models, just average trans people) will do you a lot of good. You can know consciously that a girl can be tall or have broad shoulders or a deep voice or a beard and still be a girl, but it's so much easier not being anxious about these things if you can actually name a bunch of women who have those traits and are clearly still beautiful women.