However, I am worried that installing those will give me access to powerful equipment/spells/whatever too.
So I have just bought The Witcher 3: Wild Hunt on Steam and noticed there are a couple of free DLCs available. Supreme to Extreme Graphics Options edit.
The Witcher 3 Mod Manager by stefan3372 which takes care of DLC/Mods folders and.ini files is recommended for the not-so-tech-savvy, but the ideal method is manual installation. The FREE DLC program for The Witcher 3: Wild Hunt consists of 16 entirely free DLCs, that will be available for every gamer owning a copy of Wild Hunt, for Xbox One, the all-in-one games and entertainment system from Microsoft, PC, and PlayStation®4, and is applicable to all versions (digital or physical, standard or Collector’s). The important thing about them is that they don't install automatically, you must download them separately. Except for the planned large expansions, all of them are free. In addition to the basic content, Witcher 3 offers many DLC add-ons. Installation of free DLC add-ons to Witcher 3. It has a manual targeting system available which lets you aim every attack at the center of your screen.
The Witcher 3: Enhanced Edition is a more skill-focused game with an emphasis on player involvement and control.