Take classes in embroidery, fine needlework and other pursuits expected of a young lady in Medieval England. Practice etiquette relating to the same. Be tested on what values she - as a 21st Century woman - needs to unlearn, so not to take them so much for granted that she doesn't even notice her cultural expectations and confidence in certain circumstances.
Find a name, which has dozens of documented examples that it was in common usage at the time. Get it okayed by her professor and the University administration department.
More examinations in folklore, legends, superstitions, songs, everyday gestures, hymns, and all else that an English woman in the Middle Ages would have spent her whole life assimilating. To be crammed into Kirvin's mind and muscle memory within a couple of years.
With an option on extra studies in Medieval spoken French too. And cookery.
Kirvin is stressed. She's so close to her date with the science lab., and the net which is even now being set up with a 'scene' to cover her arrival in 1320. It will be like she's been thrown from a cart attached to a runaway horse, whose snapped reins now dangle from the wooden wreckage. That gives her reason to have a trunk with belongings close by.
She has to source all that stuff too, and check it to ensure that the scientists haven't accidentally added anything anachronistic. They aren't historians. They cannot be responsible for anything but the net. She's spent hours researching places remote enough to materialize unseen, but close enough to civilization that she won't have to trek with her trunk too far.
Then the technicians have to check each location to see whether the science will allow a transfer there. Finally Professor Dunworthy has to clear it all, the Board issue clearance for her trip, and the scientists engage in some dummy runs to ensure all goes smoothly.
Too much can go wrong. Until she's lying on that marker, in the net, surrounded by her luggage, feeling the air prickle strangely upon her skin, Kirvin can't relax. Then the weather takes a turn for the worse, and there's a virus going around, and so many members of staff are ill that the lab doesn't think she can go, and she and Dunworthy keep missing each other, leaving notes on doors to catch up.
Suddenly Kirvin is lying on a forest floor. All those months of hard work and panic have paid off. She's in the Middle Ages and what could possibly go wrong now?