Can someone become a Mage or do they have to be born that way?
If they have to be born that way, then are there non-magical researchers besides wizards, and are there schools for nonmages?
Not everyone can be a mage. Though magic and magic items are commonplace in most of Etheria, true Mages are quite uncommon. Being a Mage requires the rare talent which only one in a thousand individuals will possess. (Don’t take my math literally).
In addition to having this talent, it requires many years of study and practice to be successful. The secrets of magic are carefully guarded and not readily disclosed to just any disciple. Most nations have official schools and colleges of magic (notably Sistarra Academy in Sortilege). Depending on the School or Academy, its focus, and its teachers/proponents, Mages and aspiring Mages from all over Etheria will travel great distances to pursue study there.
Mages are usually found;
• Training/teaching/working at one of the special magic schools or universities.
• Working for their government, as an arena fighter, advisor, court Mage, or special emissary.
• In the military; as a champion warrior, mercenary, or general of an army.
• In service to the community – for example Druids helping crops and Beastmasters hunting for sustenance.
• An active part of or leader of a religious order, where their magic and God are one.
• As individual rogues or highlanders, seeking their own wealth, power, fortune.