So I have a PC who is a wizards apprentice with this as their initial background:
"So Petra comes from a small town, close knit community, big family. I think granny was the local wise woman/healer but no one was ever stupid enough to straight out accuse "witch" because why would you do your town dirty like that. She does basic medicine and you make sure you don't cross her. Nothing illegal going on here.
Anyway Petra spent a lot of time at granny's house growing up and developed a knack for learning some basic healing stuff. Her family wasn't well off but enough to make sure the kids got a basic education. Petra is the brightest of the lot with a quick mind and seems to be filled with questions about everything around her.
So then there's war and Petra's town is hit bad. And one of her brothers never comes back. And a bunch of people have terrible injuries and young Petra and her old granny don't have enough knowledge between them to save them all. Petra has read every book in granny's house, including the ones hidden away under the bed that are definitely, 100% books of magic. She's hooked, and she wants to know more, but she still doesn't know enough to save all her townsfolk.
Official story is she wants to go study medicine so if this ever happens again she doesn't feel so helpless watching people die.
The actual story is she's filled with a burning rage, has no respect for rich folk sending commoners off to fight stupid fights, and if anything like this ever happens again she'll raise an army of the fucking dead if she has to protect her loved ones.
So she's off to be a "physician's apprentice" but she's got her eyes and ears wide open for anything that can help further her craft."
She is a witch (wizards apprentice) but is keeping it secret for now.
I have given her d4+3 petty magic spells and they have no real need to be converted as they don't really affect stats.
I am doing starting Magic Points = POW.
For Willpower tests I will do POW vs POW on the resistance table.
This will change how it works compared to WFRP, but I feel that the mightiest wizard will be able to cast more powerful versions of the same spell than a novice.
If Gandalf tried to cast a mind control spell on me compared to that nobber from Krull who kept turning himself into a pig, I am pretty sure I know whose spell would be easier to resist.
For MP I am keeping it the same cost.
MP will regenerate at 2 per hour, so right now her POW 0f 16 and 16 MP means she will be back up to full MP after a nights sleep.
Not thought too much about higher level spells, I will worry about that nearer to the time.