@Morgan_spurlock
I think she's excited in the novelty of it all. I mean seriously the situation is crazy enough as it is with her advancing historical development and effectively paving the way for modernization (to a limited degree)
But if this works out with the Portuguese missionaries then she international trade and European goods and south east and central Asian goods along with would come to Japanese shores earlier by centuries. This would mean European gunpowder and firearms, rubber from South East Asia, Spices from India and China, possibly even coffee and cacao plants.
As a social studies major, this is the sort of historical what if moments that make me really enjoy this story and other more historical/technically grounded isekais.