Humanoid Form

Prerequisite: Hatchling race, 4th level

Ability score improvement. You gain +1 to either Charisma, Wisdom or Intelligence.

You gain the ability to assume a humanoid form. You decide the looks of this form when you gain this feat, but once decided, it'll remain the same.
As a bonus action, you can switch between your dragon form and your humanoid form. This form is always medium. Your statistics remain the same. If you had a flight speed in your dragon form, you do not have it in your humanoid form. Additionally, your humanoid form will always have some sort of draconic features, betraying your nature. Spells and abilities used to detect a creature type will still say that you are Dragon.