So it probably has an element of intent...

"Erm, do I need to do anything now or just—show up tomorrow?"

"Show up tomorrow!" says Ahin. "Wear clothes you don't care about! Eat breakfast!"

"Okay!"

So he returns to the library, merrily.

The library is there waiting for him.

Okay so he wants to figure out how letters work, how do letters work.

Correspondence or the alphabet?

Correspondence, he wants to send that as on the paper.

Identify recipient on envelope, drop out a window of an appropriately enchanted building.

...like this one?

Yup.

Cool! And what should he use as contact information for people who might want to buy his doodads?

His room number and the name of the school.

Easy enough. He writes a letter without many details about how he came to be there but with a description of the otherworldly objects he has and is willing to sell.

And if he drops it out a window, it vanishes!

This world's magic is so cool.

Now there was that moonstone dragon, Korulen mentioned her name, can he get to her room via lift?

Does he know what hall she lives on?

Ermmmm no not really also now he remembered Keo said she'd tell the dragon where his room was so maybe he shouldn't go after her. What he'll do instead is read some more the books he's borrowed and then presuming nothing new happens go to the cafeteria to eat dinner.

Kaylo is there and snags him. "Got tickets."

"Really? To which option? When? I completely forgot to think about the reading spell—"

"The play, I got it discounted, turned out they have a student rate."

"Oh, cool, when?"

"Chenen, sundown."

"Awesome! Can't wait. Also I'm a witch's apprentice now."

"How's that going?"

"My first... whatever it will be... is tomorrow morning. And apparently the magic for potionmaking just... spontaneously appears, it's really cool."