The starting region has the flavor of continental Europe, lol fantasy trope. Cultures mix and trade enough to bring in the occasional people and goods from neighboring regions. This is not a time of empire, but of a collection of generally independent kingdoms coexisting or feuding as it is politically expedient.
Supernatural and magical elements exist, but are not highly systematized, are not easy or well know, and come at a high cost. There are no wizards of the D&D sense, but some may practice alchemy, runic, or ritual magic. There are places of power, most not well known or forgotten, and remnants of old magic that most folk will avoid at all costs.
Similarly, there is no monolithic Church. Think instead of decentralized Greek or Germanic paganism with strains of animism and ancestor worship.