Re: How to turn off hints
At the very beginning of Inquisition, (up until arriving at Haven) you are actually playing the Prologue, which doubles as a "tutorial".
The (over) annoying Hints stop popping up once you've done the things they're telling/teaching you how to do for the first time.
Different ones occasionally pop-up again later, but not nearly so often.
(EDIT: You can't turn them off completely.)