Hello there!
When you go to the
Master of Changes in your capital City you can change your race. There is an option "
Ask about changing the race" and if you click on it it will tell you how many carnival masks you would have to pay. Also you could change your race by changing your class with a Core Morpher (I´d wait until you´re higher Level for that. Because if you´re playing a cloth class and switch to a plate class the gear you´re wearing won´t change if you´re low level.)
Hope that helped! Have a nice day!