It may just be because it's still early stages, but I'm kind of getting the impression that choices don't actually matter much? You get a different scene initially but then the story just jumps back to the standard progression.
Viewing post in Sileo: Tales of a New Dawn comments
Some choices will matter more than others. Most of the choices during the intro won't have significant immediate effects with only a couple of exceptions, but as the story progresses and the stakes grow, choices may be the difference between a bad ending or a good one. Most of the choices in the intro were designed to allow the player to show a preference for certain characters which would in turn direct them down that characters route. As of right now that system isn't complete on account of there being only one route available, but we intend to revisit the intro chapter once the the first route is completed and overhaul a lot of it, this feature included.