LOVE THIS.
Some thoughts:
For stats, like the basic approach. Maybe it needs to be personalized, though? Like, maybe reduce the +2s from origin to be +1s, and let them add +1 to one stat of their choice?
The stat names aren't parallel--Stalwart is an adjective while the others are nouns. Also, Stalwart & Courage are too close. I'd recommend changing to: Ambitious, Bold, Curious, Stalwart.
"Tattle" seems off, name-wise. "Tattle" implies finking someone out, telling on someone, throwing them under a bus. I think such a move should exist, with +Ambitious.
The move currently labelled "Tattle" is good, and should be there as written, but I think it needs a better name. "Speak Truth" isn't quite right, but something along those lines.
Patrol seems a little weird to me. Is Stalwart supposed to be steady/cool/brave? Or true/honest/a good friend? If the former, it's too close to Courage. If the latter, I don't see how it works with "wander the halls of Boarsdraft aimlessly."
Make Friends: if you're rolling +Ambitious, that implies that you're attempting to make friends for personal gain (despite the "give up all your strings" part). Doesn't feel right to me. Could be a +Stalwart roll (if you interpret Stalwart as being the "true & good" stat). Or a +Popularity roll. Or a +resource spent roll. But honestly, I think "making friends" might be what the game is actually about, and thus shouldn't have a basic move associated with it.
Possible alternative to Make Friends would be something like Read a Person rolling +Ambitious, with questions like "What would please them?" and "How are they insecure?" and "How could I get them to ___?" (I don't think kids at Boarsdraft should be able to ask if people are lying, at least not right away)
For Learn Magic... maybe make it a +Curiosity roll. On a 10+, you pick one and the GM may pick another. On a 7-9, you pick one and the GM may pick two. On a miss, the GM picks two, three, or four.
For casting magic, maybe it should be "When you declare that you are using a spell you have your sheet to make a move, make that move at +1." Maybe.
More Strings!