Hey! So at the current moment there are no default items added to the game. The DLC you see there is for the system to know you want high fantasy items like potions. Once i flush out the system more ill be incorporating default items you can add later on to your current save or create a new save file. I believe im an update or so away from truly having default items.
For now, click add content and make the name for your campaign. The tutorials should help you create items!
Would love the help from the community though!