It's a little surprising; normally she is permitted to enter random forests of her own will. But not that much.
She starts walking, looking for whatever inane plot she will be required to participate in/thwart this time.
Eventually she sees a cottage. She makes for that--random houses in the woods are prime weird shit locales.
She knocks on the door. "Excuse me! I don't know what's going on here but I'd rather get it over with sooner rather than later so I can go home!"
"Maybe the entire stealth idea is worthless anyway. If someone clever gets me I'll be under a general order that won't let me do magic regardless."
"Maybe I should wait until I've picked a complete spell I want available under those conditions and assign shortcuts to its components then. Everything else can be a word or a gesture."
The silence ward is incredibly complicated. If you do it just as a ritual it can take up to a week to do. But you can abridge things indefinitely if you work at it enough--these steps are all abridged as gestures and these gesture sequences are abridged as words and these word sequences are abridged as another gesture. Most magicians are limited by their ability to create and remember distinct abridgements. If she works very very hard and is good at remembering things, she could eventually cast a silence ward by clenching her jaw.
"All right. I self-taught sorcery from books, but that meant no one but me was spending time on it."
"Jacenty" proves to be a somewhat better teacher than he had predicted. He gives her advice on memorization techniques and striking a good balance on how precisely to define a shortcut--too precise and it becomes difficult to remember, imprecise enough and it cuts down on the total number available. "I do not suffer fools patiently," he explains one evening, "but you are not a fool. Now, let's see if we can't train a bit more precision into that sequence."
Actually -
"Since I can make gates from this side," Promise says to Little Bird, "I wonder if it would be a good idea for me to just live in this world. I could bring a cutting of my tree and some seeds and grow them, somewhere no mortals have grown anything, ideally where no one is claiming the land either, or I could just make a little farm up in my tree's branches if that's not doable. If I were far away from people there wouldn't be that much risk of anyone introducing themselves."