The story I am aiming to write has someone thrown into action. However, that is not how they start off at the beginning. I definitely want to show someone whose bitten off more than they can chew, but prevails anyway.
I have some good idea for foreshadowing themes, or what characters are like, but I'm struggling to figure out how to indicate that this book will end up fast paced from about the midway to 3/4 point?
My concern is that, based on Brandon Sanderson's advice (paraphrased here), I should promise some amount of action so the end of the book has some payoff:
You make promises to your reader of what they should expect and progress those promises in such a way that there is a payoff from them. You pull readers in with your promises but if you don't follow up with progress and payoff then they won't be satisfied.
I'd like to promise action, without needing to make the first part of the book action filled. How do I do this?