Honestly, if you've sunk a bunch of hours into Inquisition and you feel like watching a bit of gameplay from the initial Ostagar setting of DAO (which, especially if you listen to the ambient dialogue) explains the basics of blights, darkspawn and grey wardens) then you'd probably be fine considering this is an alternate universe plot without the canon characters. And you could always shoot me a pm of you get lost on something. But I get if it's a comfort level thing! Don't let me persuade you if you're not feeling it ^^