How to find specific buildings in a city
For water, drink from the well (use the well to lower the bucket, then again to raise it, then Interact with your waterskin to fill it), your waterskin (e, then choose the water), or the river (straight e, but you can also Interact with your waterskin to fill it).
You can butcher (x, then press right, enter, enter, enter, and you'll see the meat at your feet) dead things for meat, as well as finding plants and meat in just plain old homes.