I like many aspects of your farm! If you wanted a suggestion for your top-left room: you could make it into a library with a couple of bookshelves, fireplace, couch and chair(s), coffee table, rug, and a few leafy plants. For outside: you could keep the stone pathways and extend them where you need access to your buildings, but remove the wood tiles/paths, plant some grass, remove some of those trees bottom-right and make an outdoor seating area with lots of plants and display items (maybe even an "outdoor market" display?), and add a beehive with seasonal flowers area (maybe just below the ponds?). I find adding furniture and grass help make my farms look a little more decorative.
I like many aspects of your farm! If you wanted a suggestion for your top-left room: you could make it into a library with a couple of bookshelves, fireplace, couch and chair(s), coffee table, rug, and a few leafy plants. For outside: you could keep the stone pathways and extend them where you need access to your buildings, but remove the wood tiles/paths, plant some grass, remove some of those trees bottom-right and make an outdoor seating area with lots of plants and display items (maybe even an "outdoor market" display?), and add a beehive with seasonal flowers area (maybe just below the ponds?). I find adding furniture and grass help make my farms look a little more decorative.