The biggest things to worry about without getting stuck in a research hole is to understand that geography effects a lot of things about your culture and your people, researching history without understanding geography is a problem because they go hand in hand most of the time. Sedentary cultures and nomadic cultures only exist if the land they live on support either Sedentary or Nomadic lives. Same goes for technology.
Depending on what kind of world your making its also good to keep in mind that societies that trade with others have more potential to grow in technology and culture then those that don't as... you know... they're trading and learning about other cultures and cough cough maybe "borrowing" ideas like the Romans. Honestly doing some history classes of time periods that are close to what your looking for can be very inspiring for short term worldbuling.
When implementing things like magic its good to understand how the world could change when people have the ability to create food or water at will or what have you. Like in my story there is a water guy who makes rivers in his kingdom, so transporting goods by river is obv gonna be very prominent and popular.
Theory crafting with your friends is one of the best suggestions i can give you when it comes to that stuff. Like the others said, people will be more interested in the ideas you come up with to make your world unique more then how accurate it is, however their are people like me who appreciate and adore the writers who have the time and energy to actually put time into this part of their stories. x3