farming is a very simple mechanic that helps you make food.
you plant (there are maybe 5 things you can plant), wait, and harvest. There is not a lot more to it. There are a couple of rules, stuff has to have a bit of space (one floor tile?) between and it needs to be 'open' which not only means 'not indoors' but frequently 'not right next to your house or tall walls'. A couple of crops will only grow in one region.

preparing food and supplies like arrows for a team will keep you busy, though.
To make turnip stew, I need to grow 3 turnips and kill a deer or hog. One stew lasts 15 or 20 or so min, so for an hour one person needs 3 or so. You also need 3 different foods at all times. So extrapolating that you can see that feeding 2-3 people is a fair chore and a nonstop one. Another example is sausage, which needs meat as above, and also an 'uncommon' weed that you can't grow yourself, you have to go find it (lots, and lots of it).

a partial quick list of things you can do beyond exploring/killing/base building:

- hunt things (animals and some monsters) for consumable materials
- chop wood
- break rocks
- fish
- grow crops
- gather and process ore **
- brew mead
- tend bees (one click, but hey)
- grind grain (windmill)
- spin thread (spinning wheel) **
- raise animals (pigs, wolves, ??)
- tend fires and lamps
- manage terrain (roads? plant trees? plant glass? smooth and shape? etc)

** these are not 'ongoing' -- after a while, you have enough