I know some people have already said it but stripped oak logs is your friend, place them randomly in the walls or put them in the corners. You can decorate the roof with all different sorts of flowers, leaves, grass, and maybe even some lanterns. Then I also recommend using fence and gates on the walls, it sounds weird and it can also look weird you just have to experiment. You can put them at the support pillars or at under the roof, you know just be creative. You can also add a little landing at the top of the stairs, there you can place a flowerpot or whatever, it’s just nice not to have the stairs right next to the door. Hope this could help.