Honestly, I never really focused on the "build this real life looking object in minecraft" aspect. The most fun I've had is while building farms, I'm not super smart so I do have to use tutorials and mods like Litematica but once they're finished, the joy of seeing all the resources pour in is amazing.
I also like doing mundane tasks like clearing a large patch of trees to make space for building another farm/building while listening to music or videos, it's really relaxing.
And yeah it's one of those games that are way more fun when you play with friends.