DM with 20+ years experience. I have a homebrew world that I have fleshed out and enjoy running as an open world campaign where the players really can go anywhere at any pace they want filled with side quests and a faction system that includes faction questlines. My favorite part about DMing is map making, and I've used Inkarnate to map out regions, cities, continents, and dungeons. You can see some of my maps here: https://inkarnate.com/p/R1Z5Q4-the-seventh-son/