>>539760187
i mean, that's the story behind elminister, right?
he was a warrior through and through. and then got groomed by mystra.

and yeah in 2e at least the text describing how to become a wizard is basically, be a servant for 20 years to some guy who maybe will bother to teach you magic missile and one other spell.
if you are role playing, adding a new class is frighteningly intensive. you will probably have to leave the current party, effectively for good, as you spend years learning magecraft.

of course in video games you just decide you'll dip monk and then dragon disciple and you've never seen a monastery in your life