#3 of only 12 sentences you need to define your entire novel.
25% of the way into your novel is the First Plot Point, where your hero realizes they’re on a journey, whether they like it or not.
Watch a television drama. About 15 minutes in, something happens just before they cut to the commercial which tells you exactly what the show is going to be about. The main character learns something that makes their path for the next 45 obvious and unavoidable.
That moment is the First Plot Point.