Yes, you're basically writing a single post as if it were a RP. You can use the NPC's as you see fit as long as you incorporate the points I listed. They are all commoners you can generally find in low-tech village and you approach/create a villager I didn't mention as long as it fits the setting.

Completing the objective is not necessary, it serves more as a motivation or direction for your character. You are in a new area and now you can show how your character would try to figure out where they are. Concluding you have no idea where you are is a valid outcome of your investigation.