Full comic : https://i.redd.it/cjd72t46nl291.png
Magic should be presented as universal, with everyone having access. Class position and education may affect your ability to effectively utilize it. In my book I treated it like literacy.
In my novel nothing stops any character from learning magic (better thought of as being based on chi but I’ve not picked a word) but some of the most powerful characters are able to inscribe chi “shortcuts” into people with no chi practice/ skills allowing them to use magical abilities without any formal understanding or awareness of chi.