Try looking for crops to grow that are nutritious but relatively low maintenance. Sweet potatoes, sunchokes, groundcover strawberries, asparagus, cherry tomatoes, etc. Bonus if you can grow excess to sell at local farmers markets for some extra income, though the easiest the grow ones probably won’t fetch a great price and on one acre I doubt you’ll have extra of anything. Also, look for native options. Less maintenance, and local pollinators are more likely to help out.

If you’re not squeamish and can get enough extra space with an enclosure, rabbits breed very quickly and just eat grass. Chickens are good for eggs and meat.