hawkeyefan
Legend
But the big question is how to give the campaign a structure. Telling the players they have a million square miles to do what they want and there's a some 20 prepared dungeons in it won't work. I guess they could still be treasure hunters, looking for old Narfell dungeons whose locations are known to local villages, but that nobody has ever dared going far into. Even when your village does have a 3rd level barbarian and six 2nd level fighters, that doesn't mean they can simply stroll in and claim all the treasures for themselves. But would that be enough? I think people interested in a 5th edition campaign in an established setting might be hoping for a bit more than that.
I would suggest doing character generation together, and to come up with some connections for the PCs to be together. Have them provide actual choices for their Bonds and use those as the focus of play. Hopefully, they'll come up with their own goals, and offer you ideas you can use to prompt them. Use the ideas and elements they come up with and incorporate them into the world, meshing them with the ones in the book or the ones you want to include.
If you don't want to come up with all the adventures yourself, then you're going to need to have the players contribute.