Is there a walkthrough or guide for this game? Not really sure what to do besides the well dungeon.
Nope. You can basically go and do what you want. The goal is to simply, grow. There are a few quests that you can get. Some basic ones are at the bulletin board, one from the apothecarist, one from the blacksmith(s). You can get some followers to help you battle. There are two dungeons other than the sewer. There's a few bosses around the main city.