Thanks for the suggestion :D
I found that having limitations gets my creative juices flowing and would make my designs more consistent. I definitely considered making modern stuff by just having some convenient source that provides the effect, like some animal juice that makes your clothes waterproof, for example.
This rabbit hole of this process led me to reconsider some of the social norms that would be present in the world. Scarcity and availability of certain materials can lead to different priorities for a lot of people. Clothes may be disposable and some tools we find to be basic can be very valuable. Some dangerous things may be made at home so may warrant a ban, and then use of them may become taboo and lead to different perception from people.
Also the fact our girl is a country girl and is oblivious to the workings of the wider world would help a lot to get her into fun situations, but she would also have knowledge that city folk may lack due to their ease of access to certain items and services.