Basically, the idea is to have your character isekai'ed from the modern world, bringing knowledge of modern technology to a fantasy medieval society. Your character will act as an advisor to a noble/princess in developing her territory, and she would take care of the actual business side of things.

This is tentative because I haven't yet thought up a concrete plot for it. I don't think an RP just about that idea is going to be interesting enough to be long lasting.