There will be always a 'first' to all of things...
To be a queen or royalty, you'll need some basic etiquette knowledge, at least while interacting with your subjects be it other royalty on the same or lower peerage and/or foreign ambassador, excluding servants or knights...
Learning some basic etiquette won't kill your personalities and it need to be highly encouraged if not be taken to the utmost priority for 'future queen' or maybe 'court lady'...
So, shit about killing personalities or being shackled by learning etiquette are just totally biased...
How do you like it if you have an uncouth and rude first lady or queen?
Your opinion or fascination bout your own queen doesn't really matter... What matter is other foreign ambassador or countries that somewhat will look down upon your worshipped queen and country... And i dare to say, your country won't have any good standing among your region...
And just like comments above that stated fmc has all innate qualities to be a good queen... Leadership, intelligence, charm, caring bout subjects, heartful personalities, loved by her subjects...
While learning etiquette is just mandatory, i dont really think it will kill your personalities...
amirite?