I personally love fantasy/cottage core/whimsical/dark mixed together!! This is what I've been doing, feel free to take any ideas!
I followed
this hobbit hole tutorial in the side of a mountain with a river system.
I took
the windows from this and added them off-center above, and i plan to add more!
I've been trying to follow a bridge and a barn tutorial but haven't found one yet

I'm building in the cherry blossom biome, artificially expanding it, and trying to add dark oak/spruce accents since I haven't gone to the nether yet.