Grains can be delivered to multiple places. There is a mill, feed producer, brewery, and port. But really, there is only one place that pays a decent amount and that's the brewery, so make sure you grow plenty of barley and focus on that.
To break things up, you can raise and milk cattle. A milk truck comes to the dairy part of your farm every day to pick up however much you have to provide. You can buy more cows and cow feed at the random shops that can be found across the farm and town. If you don't want to do the tedious work of plowing, harvesting, and delivering grain, then this is the way to go because it involves virtually no driving.
If you do manage to fit some time into your busy farming schedule to explore the town, then it's well worth it. You can laugh at the "forest" that seems to consist of about twenty trees, somehow get your farm equipment stuck when you're only driving in shallow water, and see the remains of an ancient castle. There is also a chair lift to the top of the mountain which has binoculars, so you can see various areas that are otherwise not worth checking out. While exploring you will find that even the areas that seem like they would offer some potential for entertainment disappoint.