I'm starting a new campaign and still being a relatively newish DM (less than a year) I kind of want to make a more episodic and sandboxy game like I've been reading about, without a main storyline or anything like that but more just interesting locations to explore and a bunch of different adventures I've read about seeded into the game that the players can pick. I have some adventures I'm gonna use but Im really not sure what to do about the map. Should I make a hex map for the players to roam about in and put the adventures in locations there? Or should I just have a rough sketch of the general location? I really never made a map in my other times I've DMed the game for my friends and Im not sure how to go about it. Is it worth plotting out a hexmap, and how big should it be? Just looking for general advice because Ive never done this. Thanks!